A quick bit of background:

My static is composed of friends who have migrated from game to game together for going on ten years now. We started in PSO and moved to FFXI, then to here.

Anyway. We can't seem to clear Pharos Sirius, which doesn't make a damned bit of sense and I'm able to clear it pretty consistently with DF groups. I play a SCH when running for them, and I can heal in there no problem. We run:

WAR (Full DL with Heroes ACCs and NQ Relic), DRG (Relic +1 with 50/50 Myth and DL), BLM (Garuda's Van with Myth Body and full DL), and SCH (+1 with Vanya and full DL ACCs)

We can't get past Zu. We can usually take down the first boss after a couple wipes, but at Zu we just get eaten alive by the adds, even killing one egg per batch. Its like the DPS just can't kill the adds fast enough. Our gear isn't the problem. I've had DDs in DF parties who could absolutely murder the adds down in seconds that were equipped worse or similar.

What are my guys doing wrong?