disclaimer: I have never played wsop razz or any wsop tourney
you kind of answered your own question when you said controlling variance is the deciding question. It all depends on how you are approaching the tourney. It might be a little better to play tighter in the early stages and loosen up as the tourney goes on (basic tourney strat ldo).
The point you made about building a pot to encourage chasing is pretty valid. For that reason, I would lean more towards being aggressive and hoping your hand holds.
If you want a real answer though, maybe someone like Chips can offer some advice for tourney razz play