New idea, All damage for glancing blows.
1st non pro. When using a two handed weapon and you get a crit you have a chance for a glancing blow need 20 for the roll. And if you get the 20 you hit one other mob.
2nd pro. When using two handed weapon and you get a crit they have a change of a glancing blow needs roll of 18 to 20 and can hit 2 other mobs.
Feat, Two handed weapon fighting, add +1 to crit range for glancing blows, and can hit up to 4 mobs.
Feat, improved two handed weapon fighting add +1 to crit range, can hit 6 mods.
Feat, Great two handed weapon fighting add +1 to crit range, and can hit mobs.
Barb, Fighter or warforged(great axe only) Enhancements
Level 6 two hand weapon master
Need feat improved two handed weapon fighting
Enhancement 4 points
Roll for glancing blow 15 to 20.
Level 12
Needs Great two handed weapon fighting
Enhancement 2 points
Any crit you get a glancing blow
Level 18
Enhancement 2 points
Any hit you get that would roll for crit you get a glancing blow.