Lvl 32 mage, imposible...
1- High intelect, red dragons and Oil Mist + Fire Rain with an a ocasional geyser its getting me fast and easy no loss victory right now.
I also use Royal griffin (for the summon to eat retaliations), Royal snakes, paladins and demonologist.
2- Royal griffins + Stone Skin + Magic shield from archamages allow me to get trough the scary mid game without losses.
Algo use paladins (+ phantom for resurrection), inquisitors and royal snakes.
3- Royal griffins + Archers + Hunters + Elf + Precision + Dragon Arrows + Trigger (companion).
After Cheer from RG archers will desintegrate everything (except bone and lizardman, for those use the dragon arrows), at the time i was using virgin set and those crappy elf get to 70 attack with nearly 70% crit rate. Was someting like 21 (base) + 12 (hero) + 7 (virgin set) * 1.3 (morale) * 1.5 (cheer). And without ANY archers items (telescope, elven bow, arbatror, etc, none apear)
Also using paladins for resurrection.
4- Single stack Paladins + Inquisitor blade + Banner of Faith + Stone skin + Divine armor, for boss fights (divine not nedded with 25% resist from gear agains Frog or the lizardmand boss).
I usually use the spell resurrection (30 mana for 2.5k resurrection) because pallys gets surrounded fast and gost was unable to be cast.
With my lvl 40 paly, normal.
1- Just Armageddon with single Archdemon stack... I did´nt care for no loss in that time, and Resurrection just bring them all back so its was a piece of cake in every none boss fight.
2- Target someting let it be crush to death (even use sacrifice to resurrect other troops) then Resurrention bring it back.
Sorry for bad english

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