Large pull + good dps = Win!
Large pull + poor dps = Lets hope tank doesn't run out of TP/MP and healer can keep him alive with all the damage he is taking due to ads dying very.. very slowly.
Small pull + good dps = Win!
Small pull + poor dps = Manageable.
If you trust in your own dps that is great.
As for myself, looking at ACT numbers in DF make me /cry.