Abilities working well together

[alifetaker]

Try combo-ing the abilities when you are using 2 of the same heroes,

like when you have 2 barbarians you could try to perma-stun and perma - armor reduce the creeps, just stand next to eachother in the bottleneck and as soon as 1 stun and armor reducing ends get the other barbarian to cast if, if done corectly you can heap up the creeps and just pick them off with out taking damage. and when you have enough of them you can use an area of effect spell to kill them all,

or the mentalist's moonbeam and the bard's mana thing, especially when you have 2 mentalists they both get the mana bonus from the bard, wich should hel p them tank nicely

thats what i came up with, any other stuff should be posted imo

[Pedro]

I think to most exploitable would be two battle chanters. Since they can have literally no cooldown on all skills, they could use the innate to nullify the damage dealt by creeps and slow they move speed by 90%. The problem is that even with Failure of the Forge they would have no AoE.

[Mort]

2 Entropist's is perma stun all the time on the creeps, or if not permastun, your tank would not be surrounded much as they would kill much of the creeps around him.

2 Clerics would later in game be able to hold web up almost all the time.

2 Hypnotists would boost tank's stats greatly early on and using Mind Shout's tank would be quite safe, even if someone purified, if one get purified, just Mind shout with the other.
Their Ultimate can both help killing a bit.

2 Time Mages can haste/slow and Time Stop long time's in the game, especially good if you got heroes like Thief(Hit once and move on).

2 Tempest, their Innate stacks with each-other. And the other spells can also be used frequently to lower health so tank/another caster can kill.

[alifetaker]

2 bards with their mana things on means infinit mana regeneration, cause the both regen more then they use for eachother so its unllimited

2 warrior mages could build a wal of foretresses of ice
and they could clean up like half the map with their AoE