How I would want SMN to work.

[Burningskull]

Remove Pets.
Remove Ruin Bio and Miasma.
Remove Trances.
Remove Atherflow or Rework it.
Seperate Summoner and Scholar. With the way advanced jobs work there is no reason Scholar needs to be tied to Summoner anymore.

Have actual spells that summon atherial versions of primals that appear for a few seconds to do their attacks and then leave. This way from lvl 50-60 you could have spells from Ramuh, Shiva, and Leviathan. A spell from Bahamut at 60. Then 60-70 you could have spells from Ravana and Bismark. A spell from Alexander at 70. So on and so on. Have some gimmick where one primal will empower another primal so you have a reason to cast all your spells. Maybe have the Bahamut and Alexander spells combo some how since they are the level capped spells. Or have combos of primal spells build Atherflow to summon Bahamut or Alexander to do their big attacks. This way your summons are your spells and not just mobile DoTs as people call them.