PArcher~
Not sure about your team, but we have it timed ( think one person for dread tower ) so that it is coming up right before Brain Jack hits. There is about two secs after the tank gets the Dread on top of Avatar before Brain Jack hits, and they are both just melted down in the center.
Dread dies about two secs before homing missiles go out, so for us at least, it is timed well.

Mythicrose~
Are the numbers for the summoner they giving you with pet ? or with out ?
I have seen some great numbers for both Summoner and Black Mage for this fight, mostly depends on how the group handles mechanics.
Your numbers do not seem far off, for your gear, same with the Monk if he is equally geared, both will probably come up with time and experience on the fight.
When the bard is cycling Foes does make a huge impact on the summoner btw. Our's, will pulse it even at times, just to help the summoner