The ALL INVICIBLE army!

[Handel]

Basically you need high level range units + paladins. Spam paladins to heal everyone else and take the charge if some fast enemy unit can close your ranks (rune mages help with their phantom spell).
Although some fights against heroes or large dragon armies need careful calculation (like vs the orc shaman who casts Armageddon when his forces drop under some min strength)

[Loopy]

Rune mages are basically a game exploit on their own. Take any other units + rune mages and the game is on easy mode.

[Razorflame]

well not with ANY units

runemage+paladin/demonlogist/inqisitor/warrior maiden/soothsayers is required for mass ressu

and if you think runemage+pala you cannot use level 5 units
and with the rest of the healers it takes a bit longer to resu all

and let's see how u win with rune mages with an army of

rune mage+peasants/skeletons/goblins/thorn warriors

beat the game that with no loss and i will be impressed xD

[dainbramage]

At least with CW rune mages you could only get infinite resurrection if there were enemy inquisitors. And they let you revive archdemons and black dragons...

[ironballs]

With this setup I get no loss vs. impossible - and very easily - usually 2-3 rounds of combat - as a soothsayer.

Army:
runemages,
archmages,
soothsayers,
demonologist,
black dragon.

Strategy:
first round: summon phoenix spell, call lava golem from rage, and demonologist summon demon - put an entire summoned army on the enemy front.
then use my ranged units (All except of the dragons) to hit from a far - the demonologist use Resurrection if necessary - which is rare,
and area spells (fire rain) easily kills tons of enemies - especially since they're surrounding the summoned creatures.
the black dragon usually stays out of the fight, and mostly use it's special breath attack, or defend the ranged units if somehow an enemy got close.