these two blizzard characters will probably come to HOTS someday most likely when Diablo 4 has been launched or close to that point but i wanna suggest these two heroes already. Duriel would be a Bruiser since none of the demon lords so far we have are of that category, we have diablo as the tank, mephisto and azmodan as ranged dps, so im thinking a demon bruiser would be cool, i am not sure about his talents but his abilities should be this.
Duriel trait, all duriels basic attacks slowly enemy heroes by 25% for 2 seconds
Q ability should be that Duriel gains 20% movement speed and his next two basic attacks deal area damage to all enemies in front of him.
W ability Duriel uses his frozen powers to harden his body and he gains 20% armor for 4 seconds
E ability Duriel charges forward damaging any enemies in his path enemy heroes hit are pushed away and are stunned by 0,5 seconds if they collide with any terrain.
Heroes ability 1 Duriel spawns a group of frost maggots that attacks any heroes nearby and reduces their armor by 20 for 3 seconds, basic attacks against affected heroes refreshes the duration for up to a maximum of 9 seconds.
Heroic ability 2 Duriel goes into a rage and he gains 30% attack speed for 5 seconds and all his basic attacks cleaves for the duration.
Andariel melee assasin
trait poison talons, all andariels basic attacks applies poison damage
Q poison breath, Andariel breathes out a poison cloud that persist in a small area and applies poison to any enmies that enters it, poison cloud persist for 3 seconds, enemies who stand in the area for its full duration takes additional damage over time.
W impale talons, Andariel impales her talons into an enemy hero and holds them there for 3 seconds andariel cannot move or attack while holding an enemy, pressing w again ends the duration instantly and frees both heroes.
E Queens leap, Andariel leaps a short distance landing in the chosen area and gains 20% movement speed for 2 seconds
Heroic 1 Queens poison, Andariel shoots a loud poison wave in front of her, the cloud will start to damange the first enemy building, or hero that touches one of the clouds and applies damage over time if an enemy is hit by multiple clouds it will prolong the poison duration.
Heroic 2 Queens rage Andariel extends her talons and attacks all nearby enemy heroes as long as they are within range or up to a maximum of 5 seconds each attack stacks a poison trait up to 3 times. This is probably WAY too OP but i think it could be very cool.