Game is hard

[BB Shockwave]

Are you playing on Hard or Normal?

My advice - ditch the priests... you have Inquisitors, they are better in all regards. Try to get your "Holy Warrior" medal to increase their damage even more (just cast Healing as often as you can).

Instead of Priests, I recommend you get some tough melee units that can take a beating, bears are OK but they are not the best. I recon you already got Jimmy Kraud, try to recruit Sea Dogs - their Evasion ability plus the increased speed given by Jimmy really helps. Then, explore Scarlet wind and Bolo, soon you will get the map to Rusty Anchor too. If you can, swap the bears for Paladins, Knights or Horsemen.

One other tactic you could try, as they are always available - the witch's hut on Debir always sells Royal Thorns and Fauns. These two work very well in unison.