90 Man KO Tournaments

Sample size very small but I've been running brutally in these IMO so far. It could be that my strategy sucks, but it's my gut feeling that I'm running below expectation so far. I'm not going to give up since the fields are so weak but it's going to take me a few months of playing until I rack up enough volume to be able to realistically critique my play. Just thought I'd out some frustration on here. My strat should not be too spewey; I'm certain I'm doing the right things: tight early, aggressive on the bubble - so I just need to ride the variance. I'll stick to the $3 tourneys though for now - I'd been playing a couple of $6s and $12s as well. But I think sticking to the $3s will ensure that I am not potentially hurting my 'roll with a flawed MTT strategy.