Feranel,
I had noticed the damage output of SnS wasn't much lower than 2h. But a much higher survival rate in comparison more than offsets that. I'm also trying to take into account who else would be in my party, should I choose SnS or 2h, champion, Reaver, or Templar.
In a templar-sided run, do you face off against more mages, or more melee, or is there no significant difference to the enemy composition (compared to a mage-sided run)?
You'll run into more venatori mages siding templars than you will the Templar bolt-caster-abomination things you fight in a mage side run, but you're just as likely to get punched in the face by a giant melee dude in both runs, though I think Venatori Assassins are weaker than Templar Shadows, so you have less worry of getting obliterated by stealth units.
Templar is fun for comboing groups of mobs, and is good against casters when you can close with them. Champion lets you pop walking fortress and ignore mage CC for 8 seconds while you press the attack however, so you will have an easier time chasing down casters. Honestly as warrior i find the best tactic for dealing with the one or two mages is to charge the melee and round them up, and go tactical mode and have my party focus fire the caster, one or two archers can usually obliterate a venatori mage in, well, one or two shots.
Edit: I see you were asking who to bring, sorry. I gave all my warriors SnS with a focus on dps, and just kinda rotate them all through, Cas is good againts rifts and casters, I didn't bring blackwall as much due to issues with overriding taunts, but Bull does great as an SnS Reaver.