I agree, a swarm build could have a devastating effect if managed properly. However, other weakness of the Forcemaster are her dealing with the "unavoidable" trait, unmovable, and non-living and/or psychic immune creatures and dont forget "da mana squeeze."
A build that will exploit "unavoidable" is a bad news for the Forcemaster (its even better if you can get Ranged
and "unavoidable") as you directly negate her ability to defend. Now with said, that's what Forcefield is for, but Forcefield is quite pricey (2/10; Upkeep +2) and with the Stalker (Upkeep +1) and the Scimitar (Upkeep +1) likely to come out first it would be tough not to see a Forcefield foreshadowed. :whistle: Seeking Dispel that joint. :evil:
Now a Forcemaster build - what you got in that book eating at those 120 spell points? Mind Control (6), maybe a few Charm (2), a Forcefield (4), and more than a few Force moves pushing and pulling all over the place. Grab a few Skeletons to deal with the psychic enchantments, an Iron Golem that wont be controlled or pushed around, maybe a Whiling Spirit, maybe a Mana Leech. Whatever floats the boat.
But the Mana Squeeze... Man, you want to throw off a Forcemaster. Hit them with the Mana Siphon, (that 10 channel becomes 8 ) hit them with Mordoks Obelisk to offset some of what they save with the Psi Orb, and if you can manage it as well throw down the Suppression Orb. I had a buddy have to cancel his Forcefield and one of his Thoughtspores just to keep his Stalker alive and have it able to move. It was awesome, and he lost.