Our shell has just recently beat Garuda and we used WAR (Tank) WARX2 (DD's may have been WAR+DRG) BRD x2 BLM X2 and WHM.. Timing is very important on when you have her do her 2hr, as you can skip phase 2 and immediately go to phase 3 with clones. In the run we won we did we killed two sets of clones and finally won hardest part is getting this done with no deaths damn you relic quest lol.