T9 accuracy is 492 I think anyway. Just pop lava toad legs HQ and you'll be at 353 accuracy for T13, so that's fine. T10 is like 492, T11 is 505 and T12 is 525? So you're right within the accuracy ranges with your gear.

The gears fine. Nice rounded Crit, 350 DET without food is impressive. I would say the belt needs to get remelded though. The 19 skillspeed meld on the Kirimu belt is what makes it BiS over the Dreadwyrm Belt. So if you do keep it as it is, it will get replaced, otherwise, remeld Max IVs.