Samurai, Dark Knight, and Ranger. I'm imagining a BUTTLOAD of damage here, since he's made up of all DD jobs. Glad I'm only level 53 SMN so I can't fight him <_<;;;
Velosareon does NOT drop the Attestation of Accuracy (gun). Only Mildaunegeux (MNK/NIN/THF) NM can drop this attestation. Also, nothing in ANY dynamis drops crystals of any kind. Please take care in reading information as sometimes information may not be correct. I try to provide accurate information collected from first hand dynamis experience (~70 dynamis runs) and post my findings on this site.
Gaublefaupe is the only one who can drop 2 in one kill. he always drops one of his weapon ones, then randomly can drop shield as a second drop.
Also, normal Hydra Shadows never, ever, never ever, ever never NEVER EVER drop attestations. That is an age old rumor from back in the day when nobody knew anything about the process of getting these, and it needs to die.