otherwise... I play as one of the three: Inferno, Sanctuary, or Necropolis... And in all (except for a few) cases, it's against Haven...
all the key moments depend on the player's experience... YOUR OWN experience.
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*you need to play more than a hundred battles for one faction to master its "rules"...
*you need to be able to find mistakes... your own and your opponent's. (you learn from mistakes)
*it's good if you "know" how to play as any faction... because you'll know their "rules", advantages and disadvantages, weaknesses and strengths...