At first I thought (perhaps due to wishful thinking) you were asking what abilities you would settle on for your pants (if they became selectable gear, and in addition to your current set up). For that imaginary question, my answer might be just more ink savers in addition to the set up I already have of ink savers, cold blooded, and ink resistance.
As for the actually asked question, I already have a perfect roll of ink savers (main) and ink savers (sub) on two my gears, and am just trying to settle for three defense on the short beanie (defense not being my preferred, but the most likely perfect roll on the short beanie, which I absolutely refuse to stop wearing, unless one of the new hats finally changes my mind).
ooh this is definitely tough but i feel like run speed is really useful for those areas were you can travel as a squid, or for more stealthy getaways. i've been killed by so many chargers and i feel like maxed run speed would give me the edge.
i could also use it to pretend i'm sonic the hedgehog so there's that too.