Nl 200 Aj

I prefer floating. We have a couple of bd draws, we really can't fold here. I hate raising in 3bet pots in general. I think floating is much better and we can shove many turns if he's 2barreling a lot.

Agree with getdotacom.
Esp vs aggro opponents delaying the action till the turn is oftentimes much more +EV because they're putting so much dead money out there. Probably the best cards to shove are K, Q and clubs.

By raising the flop you oftentimes risk getting reshoved by smth like AK/AQ or, if the board was T62, hands like 98s and 87s (gutshots).

Btw I think folding the flop isn't horrible because even though we need only 25% equity it's really close vs a top 8.5% range (since he 3bets 10% he'd cbet 85% to get this range):

Board: 3♥T♣5♣
       Equity     Win     Tie
CO     26.72%  21.00%   5.72% { AcJh }
SB     73.28%  67.56%   5.72% { 77+, ATs+, KQs, KTs, QTs, AJo+ }

But at the same time given we do get some hands to fold and might have some implied odds on later streets it's very close and I tend towards calling - if we just fold here our call preflop is quite questionable given this is one of the better boards for us.