I guess you COULD do barrows, but it's a lot easier to Slayer Dart/Wave the four melee brothers and then melee Karil and Ahrim, I took out Ahrim or Karil in five hits once (super pots + Chivalry), and I know my bro has 4-hit Karil and 5-hit Ahrim in the same trip before. He has 85 atk/str and 83 def. And it's also a lot easier to get good defensive armor and not pray on Verac, as he hits through prayer anyways. The others are POSSIBLE to not pray on, but with only 66 defense, its not a very good idea, since with 75 def I still take a fair bit of damage from Torag (super pot and Chivalry >.<) With low range, ranging Karil is probably pretty annoying, if you want to do that I'd recommend 65 or 70+, though personally I've never tried ranging there. So I'd recommend getting slayer to 55 for Slayer Dart (aka Magic Dart) and str/def to 75, then SD Dharok, Guthan, Torag, and Verac and melee Karil and Ahrim.