I think around 34,000, I've bought all the weapons and get new gear when I can from shops (not Spyke, such a rip-off). I also reroll abilities sometimes, but not lately...
For the shoes' main ability, I am split between ink resistance and ink recovery. My other two gear already have ink saver as the main ability. I am interested in ink resistance because of those moments when I am stuck in enemy ink and want to improve my chances of getting away, but I am still wondering just how much of a difference it makes.