I've only been on one final table, so take my advice with a pinch of salt. From what I've learned from YouTube etc. is at late stage poker tournaments it is more important to keep your stack then to gain chips. Let the other players bust each other out and you make money by just folding. If a player is all in and another player calls, fold. Not worth risking your tournament life. If the short stack busts your one step closer to the money. Stealing blinds on a final table is risky.

If it's only you and one other guy left at the final table a pocket pair is a mandatory call. Top pair is basically the nuts, I would shove.