9b Funding is odd. But, 55 str is an average cap, but it's amazingly high for a level 31 to have, I think. Anyways, you want to get a few +str equips later on to help you equip reverse gear or something, but most of that comes from things like CZHs and HTPs. In the mean time, you'll want a lot of dex boosting equips, and to find a lot of strless guns, namely Maple and UWG weapons mostly.