Is there even point in enhancing those parts of gear that give purely defensive stats, i.e. chest, legs, and boots? I've enhanced all of my skyship legendaries to +9, head even to +11 for that additional 100 crit but honestly the difference in damage received is... barely noticeable. I take like maybe 300 damage less at best from regular mobs. The biggest survival boost seemed to be the increased life pool which let's you take 2-3 more hits.