Skipping rage skills?

[Namel]

I think blackhole is actually quite worthless skill. By time I get it my underground blades do more damage. Even at fully upgraded blackhole isn't that much better than fully upgraded underground blades. And while reaver got two other extremely useful skills (time back and 50% kill) rock dude really has nothing else worth using later in game so it is good idea to skip blackhole and just use rock dude when you want area damage.

I now got blades upgraded to 820-1210 damage to all (except casters who take double that). It is still quite nice near end of dwarven lands. Specially when enemy decides to split troops in 10 groups.