I think start with Bio1 is a bit lost because it cast instance and you would have to wait for GCD after that but if you cast bio2 or miasma before you can instance cast bio1. So for the 3 main dots I would prefer Bio2>Miasma>Bio1 that should save you 1.5 sec. Anyway Bio2 before miasma or miasma before bio2 is still controversy to me because miasma and bio2 have the same damage at the start but if is situation where adds not allow to claw from point A to B, I would but miasma up first since it can slow adds then bio2
And SCH can put out a very nice damage too in not oh-shit moment with Cleric stance too, if you pay attention only for DoT things around. So if you would like to go full SMN you have to study to make use of garuda and fester 2 things that make SMN do seriously more damage than SCH
Ruin2 has high MP consumption but as I playing around with ruin 2 and manage AF I find It's not really the problem at all, you would finish the dungeon with 3/4 mp left or 1/4 left is really not to be worried, but if the fight dragging for very long you may considered Ruin1 instated. Anyway the real advantage of Ruin2 is mobility since it has no cast time you can run around like ADHD kid (and like those BRD, too) and it's a ruin of choice when it comes to very high mobility fight like Titan
The skill that would drain your mp more quickly would be blizzard2 when you use on mob because we don't have the mp recharger stacks like BLM so you would like to use it in moderation (may still manageable even you just spam them out).
Another thing is about Fester. Fester CD is 10 secs but your AF will come every 1 mins so, you may want to do some managing on this too, or you will be run out of stack with 30 sec to wait. If you find that your target would die in less than 15-20 secs after your first feaster, you may consider not to use fester again on that target and in some fight you have to spam fester as much as possible like the meteor fall in ST last boss The most feaster you can spam out will be 6 if the AF cool down complete without using any stack.
And all this may not make you "king summoner the great" but would make you life a bit easier.You may find more things out in the field so call out your pet, try kick some asses and may be you would make a better SMN than anybody else!