By turn five, you can expect to be cheating out huge mana-value creatures, like Demon of Death's Gate or Pestilence Demon
I actually think the best way to use Amass in Commander is to completely ignore the actual idea of it and use the fact that anything with Changeling is technically an Army that can be improved
If you like those cards, you can pay four life a piece to keep them, or you can put two of the three cards youve drawn this turn back on your deck
A third, worse option is to set up Slip Trip Goodra before they have a chance to play a Hood
Lightning, Army of One - 545 How many card variants do you NEED
On top of that is Brawls similarity to Maui - Hero to All, in that its an inkable card, meaning that even in the mid to late game where characters are well outside Brawls targeting parameters, it can still be used to fuel the ink ramp