What I did for that was increase mana, fully target and to switch from bolt to strange arrow. Not sure what spell you're using but increasing mana and/or fully targeting (if you aren't already) will increase accuracy and damage (might be that mana affects damage and targeting longer only affects accuracy, unsure). Or at least they seem to, I don't have anything to 'officially' back that up.

I do know that if I prep and target bolt (or footman's strike) and strange arrow in the exact same way I have more success with strange arrow.

~Katt

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A gestalt draugen swipes a hooked leonine claw at Silus. The claw lands a solid hit that cuts deeply into his groin!