How do I start level 70 Summoner quest?

[Shriex]

Not at all, but you may need to share the XP among multiple classes to avoid outleveling content.

In my experience, if you do all available quests, and run only a small number of roulettes, you will get just about enough XP to level up two classes/jobs at once.

I wouldn't say "not at all," LOL - by the time my level 60 job quest is available, I'll probably be level 73.

It's not that big a deal - I can focus on MSQ for a while. But it was confusing trying to figure out why I couldn't advance in my job.

[HeulGDarian]

I wouldn't say "not at all," LOL - by the time my level 60 job quest is available, I'll probably be level 73.

It's not that big a deal - I can focus on MSQ for a while. But it was confusing trying to figure out why I couldn't advance in my job.

i remember being a lvl 70 stuck in ishgard "sniff" , those animas took forever to do.

[MistakeNot]

I wouldn't say "not at all," LOL - by the time my level 60 job quest is available, I'll probably be level 73.

No need to outlevel content by that much. If you use multiple jobs to share the xp, you can stay close to on-level all the time. But it is your choice how to play the game.