This is my first mod. I just want to add fire around the summon for it to be complete. Ive heard im supposed to add SUMN.pms FireDamage it did not work though. Anyone have any clues on what I need to do to add the flame effect?

Try using SUMN.Addspell AbAtronachFlameEffect instead. That will give your summon the same ability spell that gives Flame Atronachs their flame effect.