Have you tried to bait their dispels? How many dispels are your opponents even running? Enchanter's wardstone also helps protect the forcemaster's enchantments, but they're not always necessary. Generally baiting enemy dispels and running more enchantments than they have dispels for tends to work well. Against a wizard with 6 dispels, you either want two enchanter's wardstones (if you're tanking) or simply win quickly before his max dispels become too much of an issue.
The forcemaster doesn't need extra channeling unless she's tanking. If she's rushing then she doesn't need the harmonize. In fact, mana crystal and moonglow amulet are generally better for increasing the mage's channeling, the crystal because it only costs 5 mana, the amulet because it's not a zone exclusive conjuration and can be deployed by a battle forge. Additionally, Galvitar, Forceblade is really useful for most forcemaster builds. It's often how she does most of her damage, though she has some other good options too. And I see you do have galvitar in your deck. You do realize it has cantrip, right? If it gets dissolved, just bring it out again. With the discount from force ring it costs 10 mana, which is only one more than the dancing scimitar and bear strength combined using the same discount for the scimitar.
Forcemaster doesn't kill everything on the board. She has much more efficient ways to deal with the enemy. Most creatures she can charm, mind control or put to sleep. You can put in a couple essence drains for psychic immune creatures, or just let them be if your mobility and defensive stuff is good enough. Forcefield is an amazing spell. You usually should include 2 or 3 of them, I notice you only have 1 here. You usually will want suppression orb and mordok's obelisk to deal with swarms. If you would rather go for a strategy where you kill all the enemy creatures, try a johktari beastmaster. If you're sticking with the forcemaster, you have force hammers to deal with the must kill conjurations like the Druid's treebonded tree.
Why do you have a second wall of thorns? As a forcemaster, you should only cast that if you are going to immediately push an enemy mage through it. That means quickcasting wall of thorns then immediately using your mage's action to push them through. Otherwise they'll just destroy the wall before you can use it.
Taking a closer look at your deck, it looks like you either want to tank or rush. You say you took out guardian angel and thoughtspores? That makes me think you want a slower forcemaster. If you want to use thoughtspores, keep in mind that they are squishy, like familiars usually are, but enchanting them with brace yourself really helps. If you don't have Forged in Fire, then you could try enchanting a thoughtspore with rhino hide and bull endurance, although then you probably don't want to run more than 1-2 thoughtspores, since you won't have enough time to protect any more that way because an aggressive opponent will be on you by round 3 at earliest. Your opponents probably won't give you that much time to setup. In general you usually won't want to summon more than 1-2 creatures with the forcemaster anyways, and if you're running a battle forge you probably won't want more than 1 creature, if any.
The forcemaster also works well with a buddy strategy. I've heard she really likes the Devouring Jelly. The Invisible Stalker is also good for a more aggressive tank, to harass the enemy mage while you setup a bit more, although he's vulnerable to ethereal attacks, so you don't necessarily want to use him against the wizard. Another good option for a buddy is the steelclaw grizzly.
Ultimately I can only tell you what works from my own experience with the global metagame. I can't tell you what kind of viable forcemaster strategy you'd most enjoy. I've given the forcemaster a lot of thought. She's my favorite mage to play. If you're ever on OCTGN, I can show you some of the spellbooks I've built for her to give you some ideas and get your thoughts going.
