Attacking the weak during late stages

I haven't done an analysis/strategy post in a while, so here is one and let me know what you think.

My recent chip building tournament strategy has been working pretty good lately. I've had good early success and pretty often have held the chip lead in early to mid stages of an mtt. I'm noticing that my current struggles are in the late mid stages, which I would describe as pre-bubble. Not quite the bubble period, but the portion right before it. Final 3rd table, or if 20 pay, in the 40s, etc...

The hands I'm getting burned on is when I'm being overly aggressive preflop. When I'm sensing weakness in position, with almost any 2, I've been unleashing my fury upon their limped biscuits. Often times I'm fighting weakness with weakness. Normally they fold, but sometimes they call. And lately, they've hit their flops. Perhaps I'm doing it too much, and should be more selective as to hands to do it with. One thing I know I shouldn't be doing but still do it is with Ace rag. I would much rather being doing it with a connected that a hand that I will most likely be dominated if called.

One hand I remember from the weekend, 30 left, and I'm somewhere 5-10th in chips. 2 limpers and I'm on the button with A3. I pop it to a big number (can't remember the exact number but it was more than 2xpot). 2nd limper calls, which tells me most likely holding is a small pp. Flop comes 245, jackpot! Limper bets out, I push, he calls. He had 66 and rivers a 3. Am I making the right reads? yes. Am I playing a good aggressive game? yes. Should I be playing big pots like this to continue building my stack? I dunno, discuss.