Hm. I've tried to do the same things with 5 shock tralls and regen aura or 7 war tralls and battle aura. Both had speed, protection and war blessing. Things attempted:
Pillaging haria-kel, whitespire, and the trakovite haven.
Seemed to be much easier with regular war tralls.
1. they do almost as much damage as the shock tralls per hit. 190 vs 225 effective damage each on the same enemies. battle aura is responsible for this. I'm sure if I used that aura with the shock tralls, they would do even more damage, but die even faster.
2. they get a second attack about 50% of the time. vs shock tralls 100% of the time, but the extra numbers make up for this some.
3. no maintenance healing.
4. 1250 hp not 850. So if 3-4 enemies gang up on one for a round, it won't die as fast.