All Feats All the Time

Our DM is doing a level 12 one shot where we automatically have access to all feats:
Setting and Racial restrictions are removed.
Can only take a feat once unless it says “You can select this feat multiple times.”
You still pick the ASI for a feat but don’t actually get the +1.
You do get a +2 ASI at class levels(4..).

Our DM is asking for our full builds ahead of time so he can attempt to balance the encounters.

What would you build?