Start over?

[Razorflame]

your unit combination is bad!
:>

bowmen are really bad ranged units due to their high leadership cost and damage they do

priest are pretty useless vs living units

you should take

horseman/royal snakes
inqi's
alchemist(their potions rocks and they are garantueed although not alot of people like them due to their relative high leadership)
evil beholders(mind control owns, and their sleeping ray is also very nice)
for the last unit u can take anyone i mostly try to get a shaman from the inn on arlania if ain't getting that i ussualy restart my game

shamans are masters of killing bosses especially with phantom you own any boss with any combination ^^(so long there is at least 1 ranged unit xD)

and if your an undead leader

use ancient vamps
normal vamps
cursed ghost
skellie archers
ghost

simple as that

any other unit i would not recommend
but then again it's your choice