"You will be able to change your choices, in this and other things, until you have made all of them and moved to the final stage of the templating process. Your options are:"
Flexible, which sacrifices the ability to bind a third Icon at this Ascension in exchange for the ability to form any Aspects you choose, and discard them to free up the slots;
Exultant, which will conversely optimize your third Icon and its Aspects to greater power and refinement;
True Outsider, which will likewise optimize your Outsider Icon;
Aspected, which will double the number of Aspects you can create at every Level of Existence;
Classy, which will allow you to bind a fourth Icon during the templating process;
Tree of Possibility, an Exception with excellent long-term potential which will let you raise any future Icons you gain to your current ascension, with the extra Aspects that implies;
Echoes of Time, an Aspect which will let you trap people in counterfactual shadow-timelines;
Fluid Space, an Aspect which grants the power to shatter paths between two points, pinch distances, open portals, and control gravity;
Rewarding Destiny, which makes people who help you become supernaturally lucky;
Retributive Destiny, which makes those who harm you supernaturally unlucky;
Resonant Fate, which makes your actions have stronger karmic consequences guided by your own sense of ethics;
The Hydra's Path, which lets you live in multiple timelines and choose which one becomes real;
Ignis Fatuus Fate, which protects you from both negative karma and the mundane consequences of your actions;
Specious Mien, which warps others' minds to become obsessed with you;
Resurrection, which lets you restore one person to life for each person you kill;
Reciprocity error, which rewards your good deeds with material objects;
Frozen World, which steals time from your enemies and gives extra time to you and your allies;
I So Declare, which empowers you to make prophecies and steer fate into bringing those events to pass;
Coin of Friendship, which enables you to manifest the 'vibes' generated by your actions as loyal Outsiders;
Defensive Power, which gives you an optimized boosted Pinnacle Aspect of defense;
Magical Power, which gives you an optimized boosted Pinnacle Aspect of spellcasting;
Bodily Power, which gives you an optimized boosted Pinnacle Aspect of health, strength, speed, toughness, dexterity, and so on;
Arcadian Power, which gives you an optimized boosted Pinnacle Aspect of Glamour and Psionics;
Control of the Light of Law, the higher element which creates and transforms in accordance with your will;
Control of Oblivion, the higher element which unmakes all things absolutely;
Control of Iron Glamour, the higher element of the Iron Fae which produces metastable and unstable narrative causality;
Or control of Deep Dream, the higher element of the horrors from before time, which warps the laws of physics.
I can provide additional details on any options which interest you.