Oh heavens no.
I was just listing down most of the important defensive spells since you asked for them. You do not need all of them at the same time.
Stoneskin lasts for 9 hrs, so cast it everytime you rest/wake up.
Protection from Magical Energy is only needed when you know the enemy has Abi-Dalzim's Horrid Wilting. Since it lasts so long, cast it before you enter the battle.
One great way to set up your defences is to use Contigency and Spell Trigger. In one round, you can have 4 defensive spells up.
Note also that if you have tanks and/or summons to distract for you, then screw defences... blast the enemy to the Abyss and beyond.