Thanks a ton to all of you that have replied here. This really highlights my ignorance on enhancement caps and the like. For those of you curious as to why I'd 5 slotted it, I'm extremely ignorant of enhancements and such so I simply thought more enhancements = more endurance.
All enhancements while levelling I've just found as loot other than the damage/recharge enhancements from the P2W vendor.