It's not fun, It's not hard, It's just there to get you and you won't enjoy it.
Yes there are strategies, yes there are builds. But when you use a spell and get a OS on your main hero for no reason, then get stun on the 2nd hero, then lose all actions from the 3rd after one spell aswell.... well guess what, you just can't play anymore.
No strategies can prevent you from losing to random rolls.
Also, building characters costs way too much, there are no interesting new mechanics and its really long to do just about anything.