It might takes multiple tries to get all the slots maxed out in elemental affinity due to the fact that you have to match the elemental balance required for the synergy synth. You will know that you have the correct balance for max elemental affinity for that etching when you get a "Smooth Synergy" message. Once you get that you end synergy and you will have the max etching for that slot. The reason why it takes multiple tries to get all 3 slots with max strength is because you have to HQ 3 times in a row. If you HQ the first two slots and NQ the last slot, you have to remove the etching which removes ALL slots and you have to start over.
Return1 argued with Mellowy and wrote:
Seriously, you won't be @#%^ing happy until SE releases a full sized Bahamut avatar you can @#%^ing ride and use to kill players that annoy you, one shot AV/PW/Shinryuu, and burn the FFXI nations to the @#%^ing ground for fun. All while actually restoring mp used instead of costing any.