Hmmm, lets see. One question at a time.

1) Currently have the Atma weapon, stat wise it's equal to zenith so not super great. But there's no real quick improvement i can get :/

2) I dont actually shield lob everything. I shield lob one thing and run through a group flashing them on the way over to my intended tanking location.

3) I usually lose monsters about halfway into the fight.

4) Jobs? Anything really, some days it's a black mage, but i can blame that on not using quelling strikes. I've seen Dragoons do it too. I do look for Regen being up from WHM, but it rarely is when i lose it.

5) The Halone Combo. I've switched off to it at times, but as soon as i focus on one, the enmity on the others is going down too fast to keep up. So i basicly have to keep AoE'ing or i lose it.

6) It's possible my flash doesnt hit everything while i run through them, but i dont know. That seems a bit too simple.