I was using Support Hybrid T4
And yes, I should say this was using a general pve build, so I was cycling my AoE attacks. I can get some pretty solid -res stacking with them though, which I believe is why I am able to get solid times. Spiders (and all feats) get the chance for toxic proc, which makes the spider pets do an absurd amount of damage, especially considering I can stack -120% toxic resist and have each proc hit for around 100 dmg (12% chance per attack on all attacks between myself and 6 spider pets).