Well when ever I do a force master spell book I always end up having way under my maximum spell points so I put tons of filler cards in it. But the game ends before I can even use half of the cards. Forcemaster is just cool like that haha. But the only real problem I have with the force master is that most of the time I get targeted by tons of ranged spells or unavoidable attacks. She may be able to use her defenses and forcefield, but she definitely seems like the kind of mage that could benefit from a couple guards. Yes there might be better choices then Togorath, but The appeal to me is his regenerative power and ability to guard as a free action.
Consider this. Keep him in your zone at all times. I know your opponent may try to teleport or push you but do your best. Now you have a guard that can intercept all projectiles and even if a creatures has an unavoidable melee attack they have to attack Togorath. You all are talking about his weakness of not having a quick action, but combined with pulling enemy creatures into your zone with Togorath, you can have him stomp them good. Allowing you to focus on building your invincible mage and playing with your opponents creatures.