When to start the Summoner Primal quest??

Hey guys!

My SMN is a fresh level 50 and Minfilia wants to give me the next Primal quest. I think it's Bahamut.

My question is: Should I do the quest immediately after the whole Praetorium/Baelsar dungeon that I already did or should I focus on the rest of the main scenario quests and leave the primal for the last quest before I hit Heavensward??

Thanks in advance :)

Not to spoil it, but feel free to do the new level 50 quest immediately and do the others as you reach an appropriate level and have appropriate gear.

Thank you, fellow Summoner! :)