I run with 2 mages and a lock so ymmv.

For the archer event, I run straight down the hall. I know you said you had trouble with this, but really so far it's been the best way and once you do it once, you'll get the hang of it. Run straight to the end guys spamming shield, hammer, and consecration as the waves come in (making sure to save a shield for the archer guys). Once there, hit the final 3 with shield, AE the adds, and then burn down the final 3.

All in all I spend about 30 seconds in the hall. The adds do pitiful damage so my goal is always get to the archers ASAP. Turn off fire aura and stick with Devotion. You won't get very much fire damage if you sprint the hall. Your clones shouldn't be taking much damage either as if your casting consecration, shield, and hammer frequently all focus will be on your tank. With avenger's shield as insta cast now, it's a great aggro building tool. Those 3 paired with Improved Righteous Fury and your clones are good to go. Pretty sure the waves stop once you engage the archers so keep that in mind.

Also, don't sweat the hamstring. Just keep your tank moving down the hall and consecrating. Hamstring just means more pulses of consecration for the stuff behind you.

A couple variations I used when I first tried this event was to run all the way down the hall and position my tank to the right of the doorway looking at the final 3. I would then ae all of the adds and rush the final 3 when we're clear. This trivializes the archer fire since you're already way down the hall, and reduces the number of mobs you have to deal with when you finally do engage the last 3.

Hope this helps.