Originally posted by Frank Dunn:

Does wearing the fishing hat, which boosts the fishing skill, decrease your xp gain or increase the amount of xp needed to progress to the next level since it is artificially boosting the skill level? I caught a lot of anglers before the queen fight and it seemed to hardly level at all.

I'm not aware of any gear that boosts xp gain. You CAN boost xp gain with rested and resting buffs though.