Upgrade or alternative upgrade?

1. Mountain Guards: +5 to defense won't hurt. 2. Harpooners: They deal noticeably more damage, and I wouldn't rely on archers with their crippling wound. 3. Against Necropolis: Bear Lords are effective; against everyone else, use Northern Riders. 4. Berserkers: Due to their Berserk Rage ability. 5. Arcan Priests: Cross-attack is great, and there's a higher chance they'll cast a fire spell on someone. 6. If you have Armageddon, use Jarls; if not, use Earls. 7. Lava Dragons: Due to their Lava Shield ability. Something like that.