On the contrary. The reason that you're trying to get your opponent to use up his dispels as fast as possible is because you don't want your important enchantments dispelled. Enchanter's wardstones, by increasing the cost of dispelling your enchantments, can either make it so that your opponent doesn't have enough mana to cast dispel on your enchant that round, or it can potentially force them to make a choice between casting dispel on your enchant and using their mana for whatever other spell they had planned. Shouldn't underestimate the effectiveness of mana denial, even a little bit of it. I think losing 2 mana is often a lot more harmful then a lot of people realize. Wardstones cost actions and mana, yes, but so does nearly everything else you do in the game. The important thing is that your opponent is paying a higher cost than you (and that cost doesn't necessarily need to be paid in just mana either, of course.)
That being said, I think the Forcemaster's main strength is in her high melee attacking. Galvitar is kind of wasted if you're only planning to use it against summoned creatures rather than the mage itself. For a full action you get to roll 4 dice with doublestrike, and for a quick action 4 dice with piercing +2. Just enchant yourself with a bear strength and you've practically become a killing machine!
Strategies like the one you've just described are much better suited to the Wizard or the Druid, I think. Togorah would probably be pretty good for a defensive buddy build. If a solo mage wants to play the long game, I think they're going to have to have some way to make position VERY important. I think it would be good for a mind/war mage. Use positional tactics so that you don't have to fight all of your opponent's forces at once, only the ones that are nearest to you. Traps, walls with upkeep costs, push effects, hindering (like with mangler caltrops), incantations that give lumbering and slow until end of round, access to high armor, and a full action attack with a high chance of taunting whatever creature it attacks, probably from the mage's favorite weapon.
That would be really cool. *starry eyes*