What to do with my Stirgeman pants?

I would upgrade them to their level 70 version, go for a 90% potential, and then sell them.

dont. go for level 90.

simply put - stirgys are the only pants-option for bowmen / pirates / mages, meaning that unique 3 line level 90s are worth quite a bit since they are by far the best option availible for said classes (with +%dex or int respectively). and if you happen to get HB on them, then that's a bonus.

that said - i've blown up 4 pairs already. chances of them poofing seem to me around 33% or so on the first upgrade, so its a risky thing to do. even worse to consider getting them 3 line'd (if you get 2 line you can re-upgrade to get another set to pot. but then of course you can blow them up again with the pot scroll itself).

might simply be worth selling them. nevermind the fact that the process to upgrade is a pain in the ass in itself unless you have a bandit - the monsters barely drop the proper etc items for it, so steal helps here. theres also no good place to hunt the green ghosts that drop 2 of the neccessary etc drops. so yeah...