Garthanos
Arcadian Knight
players having choices over that epic destiny of how they advance into the extraordinary epic levels are often on the hit list of those saying I want it explicit from boons (controlled by the DM) or something similar ie the boons in a sense the 4e powers and feats they gained in epic tier were chosen as a group by the player (4e boons were like magic items and not entirely chosen).As far as training and feats, I have no idea what that has to do with the conversation.
The description I read had epic levels being in 5e being 17 to 20...