In PLO AAxx is not an all in hand preflop. Unless you're just looking for your opponents to fold . Even if you hit another ace, unless the board pairs to give you a boat, a set is not that great in PLO. You want to be shooting for straights and flushes mostly, everthing I've ever read on PLO states this. Someone with a hand like 357 10, especially if they're suited or double suited, could crush aces most of the time. And with a hand like AAAx I wouldnt even bother playing unless you can get in and out cheap, cause the chance that you'll hit your case ace are slim, and still all you'll have is a set.
yeah I agree omaha is a straights and flush game, but were talking about preflop all in.
I calculated the odds on the hand you said 35710 double suited against aa94 3 different ways Preflop:
1. 3d5d7c10c vs ah as 9c 4d = aces favorite 54% vs 46% preflop
2. " " vs ah as 9s 4d (suited outside of opponents suits) = aces wins 56% vs 44%
3. " " vs ad as 9c 4d (suited once in opponents suit) = aces wins 62% vs 38%
(odds courtesy of cardplayer)
a couple things to remember imo. 1 even with 4 cards, people don't hit hands all the time in omaha, its the fact that someone else has increased chance to hit a hand with 4 cards. Its alot of bluffing going on. You can't bluff aces preflop. Plus peoples hands aint always as coordinated in the best fashion when your getting someone all in. Rarely have I seen someone get in all in against aces with a hand like qj109 double suited, it happens but more times than often the hands are much more uncoordinated than a hand like that.
If your playing for 2 pair against aces, which I do often,its cool to see the flop but not when your virtually all in preflop because the reraise is about 70% of the stack you have. Alot of times people will get all in vs aces with an ace in their hand (there goes your out for an ace) and let the other person happen to have another card that you have, because just as you can hit 2 pairs the player with aces still has 2 live cards also to double pair. If you playing for the straight or flush thats cool when your calling off about 30% of your stack to see the flop, but 60% and up your really playing a preflop percentage game that in the long term the percentages say your not going to win because your virtually pot committed.
Another thing if you play for 2 pair, remember, even if you hit 2 pair, if that board pairs again any card that you don't have you automatically lose if it doesn't make you a straight or flush. And the board seemingly pairs ever so often.
Straights and flushes are made often in omaha, but to put your whole stack on the line and play a percentage game preflop on a single given hand to hit a flush or a straight, without regard to what your opponent has outside of aces; in the long run ring game the math says thats never going to add up in your favor in the long run