Alright, added Maker to the table.
Now, to help us get a sense of balance I propose a thought experiment.
Build a character at let's say level 5 10 15 and 20. Then figure out how you approach these following combat scenarios.

You and your party are surprised, your wizard is caught between buffs and gets caught up defending himself and cannot help. Your other physical heavies get their targets, and cant really help you. You are left with a handful of enemies to deal with by yourself. Lets say 3 then 6, 9, and 12. All of them are melee heavies.
Ill add more later. Just put up how you would go about it, round by round isnt needed unless you want.