I am wondering if anyone can shed a little light on this for me:

I have recently started playing this game, and have found that at lower levels (which is all I have seen so far), my rage gladiators run out of steam pretty quickly, without hitting often enough to compensate for it with damage output.

Is this normal? At the moment I have activity and bloodlust set on 5, and down to 4 once I get a bit tired. At what level of weapon skill should I think about raising the activity? Any input as to how other people set up their rage fight strategies would be appreciated.