I always use the default slot for ACC in brawl.
As for stamina, I am going to take it, but I might not need it being DM/EA as I have 2 end recovery powers and conserve power.
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with a view to getting fury built up quick and with no perma hasten it might be worth considering recharge reduc in brawl.
and stamina is a must i feel, slot it til ED kicks in and u get very little return on extra slots
Slot brawl perhaps only for PvP - thinking about thrice accuracy, tbh. 
Auto-toggled brawl 4tw, it seems. DM/DA brute? Same here, I'm getting stamina and seeing if I really need it because of so many toggles to run - rather have it than not. Three slots in stamina under ED.
I don't think it matters if brawl doesn't hit, fury still builds up miss or hit.
@Aubrey
Any brutes going to slot brawl? (was thinking of leaving it with 1 slot but keeping it in green with damage enhancements, as fury increases it has helped out quite a few times)
is stamina required, and how many slots? (at present i do run out of endurance, but i'm not fully slotted how i want to be yet)