So about Summoner...

[Zerathor]

I think you didn't get a crucial detail. SMN isn't a very "prog-friendly" job. Their damage will suffer a lot until they know the fight. SMN excels at weekly clears, high DPS, fast runs. But on progression, a SMN will have a hard time (much like BLM I believe). The only way a SMN can carry a party is if the DPS is barely enough to pass the enrage timer. And usually, if the DPS isn't enough, it's because people died to stupid, are really undergeared, don't know a proper DPS rotation or couldn't execute it because of the mechanics. Not because you didn't bring the meta job.

The only situation it's not prog friendly is if you're dying with all your stacks. Other than that, it's extremely flexible while being able to raise.

It seems like the only thing a smn needs to learn on a fight is if they need to hold anything for aoe if adds exist in the fight. Aside from that, the rotation is very straightforward.