--IDEA--
Buff survivability of Sorc Spirits. Possible solutions:
1. Add player's gear resists to the spirit.
2. Give them splash attack avoidance/reduction
3. Buff defensive stats via spirit sympathy.
4. Buff player scaling.
5. Give them straight reduction during passive-defensive modes.
On a side note - buff the spirit recovery. Maybe make it heal 100% but at CD?
-- WHY --
As it is, Sorcerer summons are too thin in conjunction with out buffed pvm. Level 2 spirit dies catching stray bowling bash from Verus monster. Level 3 spirits die in one hit from wide range attacks from most high+ mvps. Wide Range/Splash is the biggest killer here. During farming since you cant really control it and, as a sorc, you naturally kite mobs - not face them head on - they join with mobs and catch even smallest splash attacks.
Spirits are major part of the class - yet in most cases you don't use them as they die too fast.
As for spirit recovery - it just heals too small. I have never seen spirit taking less than 50% damage at once to its hp since 150.
-- BENEFITS --
Make the Spirits actually usable in battle. More possibilities = more fun.