I can't help but feel that something is wrong when I beat all three campaigns completely, yet I'm still missing 7 units, 8 accessories, and an achievement.
Trial 4: All titans. The best way to beat him is to build walls with the cursor over his right knee (the one on the left on screen). It will push him back a little every time. Trial 5: Black dragon, goblins/little hobbit, elf hunter, succubus, witch, and elder wizard (any ranged units will do, but these ones worked pretty well for me). Spam lvl2 meteor if you have it. Don't forget to plus both of these so everybody can see!
Trial 1: succubus, elderly wizard, witch, little hobbit, goblin, and black dragon. You will want to have all of them fully upgraded. The goblins and hobbits will prevent colossus from moving most of the time, so just move your ranged units occasionally so they don't get too close. Trial 2: Black dragon, death, white tiger, goblin, centaurion, and witch. Goblins will prevent the iron fortress from moving and the ranged units will make sure they get close enough to stop it. THIS IS A VERY LONG FIGHT AND MAY TAKE MORE THAN ONE ATTEMPT. Trial 3: Golem, Black dragon, white tiger, death, goblins/hobbit as usual, and any other titan if you have one (if you don't anything will do). No strategy other than build up then just let them constantly attack and spam lvl2 meteor on the enemy golems.
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