I pre-pot, and by doing so, pot's still not up for the start of 1st pool, but they'll all sync at the 3rd pool.(fire ele + ascendance + pot) I was at 175k dps till the end last night, if i wasnt stupid and died at the end.. Seems decent to me.
Being number one on damage doesn't help prove that elemental is gaining benefit from the pool. The problem is that it is a percentage based damage buff. Some pets (A Monk's Xuen for example) don't gain benefit from percentage based raw damage buffs - only from stats (potions, procs) and heroism. So the question is if the elemental properly gains that benefit or if it is like those other pets and doesn't gain specific benefit from the pool itself.
Clearly I didn't explain myself well in a typical fight on the first cd with all CDs used my fire elemental will do about 4.5million DMg in the 1 minute he is up on Jin he does almost 8 million thus he is benefiting from the bonus dmg. Answering the question at hand does PE FE benefit from the pool and the answer is still yes