Merciless Resolve is a great skill with a lot of potiental, but can be a bit buggy and hard to use at times. I'm not sure if anyone has ever suggested this idea but I think it is a great idea for this skill.
My suggestion would be 2 options:
First would be to modify the skill to act like sorc's crystal frag. Lower the damage and put like a 20% chance to be able to shoot the bow after using magic abilities. Also change the 8% damage increase to always active when you have the skill slotted. I feel like this would help mageblade tremendously in pvp without being too op.
My next suggestion would be to change the four light attacks that trigger the bow to magic attacks. Many times it can be hard to hit light attacks with dodge roll so I feel like this change will make it easier to proc the bow. Also this gives melee mageblades an easier time getting the bow to proc.
Those are just a couple thoughts I had. Any comments are welcome!