well I'm not very experiance at omaha or at limit games but I've been playing a lot of both recently. I play the micro limits on pokerstars
(very loose) and I play ultra tight preflop most of the time.
I find the you usually get decent odds
when you have any chance at the nuts and the only time I raise is when I get them. The only reads I pay attention to is if a player is raising on every street (usually with nothing) If it just me and them in the pot I'll probably always call with any made hand.
My advice is definantly not sound advice but any input is good input in my opinion. I usually get paid off for my losses when I do make the hand and until recently been pretty profitable doing it.