You block the nut flush draw, you are up against 8 cards and you see a bet, flat and a re-raise in front. I think you can pretty easily get away from this hand. Even if you are ahead on the flop it's pretty hard to hold against so many cards. It's very early in the tournament and I don't think it's worth the risk, you will definetly find better spots.

I think I would question your statement that the players are generally good... not often that a 3bet pot goes 5-way to a flop if they are 'good' players. As played it's a very easy fold after that action, and I like your check on the flop since you're likely to x/give up here a lot multiway and you want to have some hands you can x/c or x/r with depending on the action.

Gross!

AA is probably the very top of your range here. However, I'm thinking that against that many villains it might be fine not to have a continuing range sometimes. You're not going to get exploited, because noone else can bluff with abandon -- the other villains are protecting you.

The hands that are ahead of you are only 22, 44 and 54s (and maybe 64s and 43s at 50% weight), so a total of ~8-12 combos. After the first flatter most all of the rest of the 'field' lol can have those hands unfortunately. Given the fact that you're blocking the nut flush, that makes their ranges more valueish.

It's hard to know what to do here. I think cbet give up, check shove against 1 player, cbet / stack off (it's hard to get credit for a strong hand on this board) might all be reasonable and pretty close. I personally don't know if I can fold AA here unless it's a hugely expensive tournament and I'm settling in for a long day. Multi way pots are tricky because they amplify the chance of someone flopping really strong. I would love to hear a more substantive analysis than mine here lol