You can make custom spells to summon creatures like lich longer. Also, you can apply buffs to help them. I have custom buffs for each type. Ie Dremora Lord: Fortify Endurance/Strength/Agility/Speed/FATIGUE and he will dish out a lot more damage. I summon for 75sec, but for 60sec with high mana spells. Hilarious in the arena, can just invis and watch him win. You can easily 4x his damage output.
