<Yes. Should I keep going until they intervene.>

:Shield the room you're in and then yes: All the Andalites with him should have basic physical and energy shielding down. 

Mhalir moves in Leareth's morphed body, going for the nearest comms equipment to send a message to the Pool ship, alerting them that a Gate is about to happen. 

:Stage two: Leareth barks to the other Andalite in morph. :Hide, morph Gifts, shield yourself, and start compulsioning everyone in your range. I am going to begin Gating reinforcements from the Pool ship shortly: 

The Andalite at the computers keeps sending video feeds. <There are people trying to blast their way into the room now.>

The other Andalite hides to morph.

:I have enough for now. Destroy or shut down the computer: he doesn't want to make it too obvious what he was looking for, not that they'll guess why, :and - can you manage a short-range Gate to the nearest empty room you can Farsee?: All the morphed Andalites should have Farsight, it's not hard to train. 

The computer can go up in flames, the Yeerk can get compulsioned not to leave the host or move or speak, and he can attempt a Gate, it's going to take him a minute, he's new at Gating and Gating based on Farsight's harder and his shielding on the room is not holding that well, though he also has a shield-talisman he can count on once that fails -

The shield-talismans that his crew of Andalites are wearing (they can wrap them into the morph pocket in z-space when in tiny morphs like bugs, but morph inside of them for Andalite-with-Gifts) are the same one Mhalir was wearing during the coup attempt, and should hold off Dracon beams even at max power. For a little while. Though it'll still be distracting and distraction plus being new at Gates isn't great. 

Leareth isn't in a very effective position to help out, he's well out of mage-sight range and he's a bottleneck on a lot more parts of this plan. Either the Andalite will be okay or he won't. 

He acknowledges this, and then switches to Mindspeaking everyone else he's already compulsioned, he's not a Companion who can Broadsend to hundreds of people at once but he can do them in batches, done, done, done... 

People around the compound stop moving. The ones he didn't get rush to communications stations to warn the other bases and the ships in orbit.

He can't get all of them at once, but he orders the second Andalite, who should be done morphing Gifts just about now, to focus on stopping anyone about to send communications. 

He needs bodies, first, so he does a Gate to the Pool ship, anchored on the doorway of a conference room full of unmoving panicking Yeerks in various hosts. On the outside of the conference room, so it won't trap all of them in there until he takes the Gate down. It's not even a very hard Gate, the ship is in orbit and not directly ahead and moving but it's less than six hundred miles away and he's in reach of his node-generator from here.

The Gate isn't going to be at all subtle and they'll know what it means. He waits. 

His reinforcements rush through a few seconds later. 

Leareth gives orders as they come through. Go take out the people attacking the Andalite who was trying to Gate out of the computer room. Spread out around the base and compulsion - or just kill, if they don't have time for compulsions - anyone who's still moving, focus on stopping people who are at comms stations. (Though it's got to be too late for preventing any message out, but he knew that would happen.) 

And he pulls the last five Andalites aside. :I am going to Gate you to a ship in orbit, the thirteenth Council member is there. I would like her taken alive if possible. Killing everyone else on the ship is acceptable but dispreferred:

He's already working on said Gate. It's a trickier one, on a moving ship he's never seen himself and is Gating to from a memory he pulled out of someone's head minutes ago, but he gets it within a minute, and the final stage - the only detectable one to the Yeerks on the ship itself - takes three seconds or so. :Go: 

They head off.

Mhalir is in communication with his staff remaining on the Pool ship, now, finding out what sensor data they have on the Yeerk ships and any other installations in orbit. Someone is likely to start firing on them any moment now, once they get the message, but the ship is discreetly equipped with rather more shielding and weapons than Pool ships normally have, there was time for some renovations on Earth in the leadup to this.

Meanwhile Leareth can use their Mindspeech to interrogate the terrified Yeerk Council on the other ships in orbit, hoping to find someone who's been to all of them so he can Gate people there once he has any Andalite shock troops to spare. He doesn't think it should take them long to secure this particular base, but he's mostly leaving that to the others right now. 

The Yeerk Council has figured these are Andalites impersonating Visser Three and they're terrified and also confused, Andalites don't have mind-control powers. Between them he can get people who've been to most of the ships in orbit, but there's some courier ships none of them have visited. 

Leareth Mindspeaks all the Andalites now spread around the base, asking them to please coordinate amongst themselves and, once the base is secure enough, start reporting back to him so he can Gate more groups up to the other ships in orbit. He's going to stay here, where the comms station to stay in touch with the Pool ship is, and where he can interrogate the Council for any further information. And incidentally hold them as hostages against orbital strikes from the Yeerks on his position.

Mhalir messages the Pool ship again. What's going on in orbit? Also he wants to know right away when the Andalite reinforcements make their hyperspace jump in, they're due soon and once they're in Leareth can start Gating ground troops to the other locations on the planet. He would like them to fire on any shuttles they see attempting to leave the planet and rendezvous with a ship in orbit. 

The Pool ship is under fire from all of the Yeerk ships in orbit except a couple that seem to be doing nothing, probably because they have fighting on board. Its shielding was reinforced in anticipation of this, and is holding. It is trying to stop shuttles and trying to stop escaping jump-capable ships but it's fairly outclassed, hopefully the Andalites will be here soon. 

There's not that much Leareth can do except wait for more Andalites, both those already on the base and the soon-to-arrive reinforcements.

He does duck into an unused room briefly to let Mhalir demorph and re-morph Alloran - if Mhalir does it he can cleverly wrangle it so Leareth's body morphs 'around' the Yeerk, which will mean Mhalir doesn't get trapped in hyperspace if Leareth is knocked out and ends up stuck in this body. Which shouldn't happen because everyone within at least a quarter mile of him is compulsioned to surrender and do nothing, but still. 

The Andalite forces jump in precisely when expected and split up so some can come to the defense of the Pool ship and some can chase down courier ships which haven't jumped yet and shuttles between ships and the surface.

Mhalir opens communications with them, and gives the locations of the known ground bases if they have any capacity to shuttle troops down. If they're too concerned about being fired on right now, but can spare soldiers to secure the sites on-planet, Leareth can if necessary Gate people down to his current location and then back out again, he'll just need them to transmit a short video of the ship's interior. 

They can't shield shuttles very well from the kind of fighting going on now but they're happy to transmit video from which soldiers can be Gated.

Leareth is starting to feel the strain of this much intense mage-work, but he's got the node-generator and he can time a Gate for when the ship is on its nearest-to-him point in orbit, only a few hundred miles, at which point it's much easier to hold even as their relative position shift. 

Then he can have a lot more Andalites fairly promptly. 

(The Compulsioned Yeerks standing around are so horrified that Andalites have these abilities.)