Thank you to the developers for taking the time to see the disparity with back bar weapon choices. It is an issue I have been staring at for a bit.
I would like to just make visible the reason that Bow and Shock staff back bars are the pick of choice. The reason these two end up being the choices is because of the length of time they are active for. Fourteen seconds is what makes Bow the best back bar weapon since it procs the enchant on the weapon at 10 seconds, causing the enchant to be active for 15 seconds. The extra 5 seconds, is roughly the time you need to make a full rotation on the front bar, and rotate back to the back bar before you need to activate Endless Hail again.
I appreciate the realization that Two-Handed and Dual Wield are lacking. I appreciate the comprehension that if you are melee has to pull off, because of melee damage, therefore for the greater risk melee deserves a greater reward.
As a recommendation, increasing the damage of melee is great, but the increase of duration from 10 seconds to 14 seconds (standardization), would cause the use of Two-Handers to increase as back bar weapons. This due to the fact that the 10 second time factor breaks up rotations (Venomous Claw, Noxious Breath, Trap Beast are over 10s) and decreases up time on Weapon/Spell Damage enchant.
Thanks for paying attention. I hope this is helpful in future developments.
Sincerely Your Sword-Singing Tank,
-Target