Also FYI - my Helicath is the stun target for some reason but Doompriest always cleans it off right before his next turn.

I'd say he is because he's rocking the most def and is putlying up block dam.  I use skullcursher because he will always be stun target to avoid activing counter attack 

do you have any other options for dps? royal guard isn't the best choice for cb and venomage needs a debuff extender in order to really shine. that said, you may be able to hit your target simply by improving their equipment. the broken sets might be necessary to hit the stats needed for each champ, but you've got underlevelled equipment on almost of your champs. bringing all your dps' weapons to 16 alone should offer a notable improvement.