In your opinion, which faction is the strongest in Heroes 5? Let's discuss the advantages and disadvantages of each faction.

Damn, only 3 hamsters have voted and you're already drawing conclusions; soon the long-ear fans will swarm in and vote for them, though they'll actually have to be torn between the good ones and those not so much. Necros are constant and already without alternative—death is death.

As a "long-ear fan," I voted for the dark elves.

Necros are currently better in many parameters, which makes them the strongest race in Heroes 5, all other things being equal.

I disagree... the dead are devoid of morale, they cannot be frightened, poisoned, etc., but they don't strike twice either... a not-so-high speed certainly doesn't flatter them, nor do they shine in initiative....
As for numerical superiority, that needs to be achieved before it becomes overwhelming.
In short, dark elves will tear the necros apart before the latter can pelt them with hats (IMHO) :D :D :D :D