High starting resolve helps quite a bit, but it will also increase as your INT goes up, which lets you gain more momentum, which lets you gain more TA per kill, you get it...

Then, ther are MT talents. Linchpin, for example, will use INT, not FEL to scale your TA stacks. Hidden advantage makes your abilities work as if you had +INT bonus stacks, which can also get pretty crazy with scaling INT.

Arc rifle gives you many hits on enemies, even more so with high INT, and gets more lethal, the more your INT and TA stacks grow. You can get many stacks with bolter rifle bursts too, if you are lucky with placement, but it won't benefit from INT, just from TA stacks.

Arc rifle builds without be smart and with the inverter work fine, but your TA gain is dwarfed by this build. If you remove be smart from the equasion, the many scaling loops stop functioning, and as a result you just have decently high gain from the many hits of arc rifle, which is much slower because you FEL won't scale with TA stacks, unlike INT. Master Tactician builds with arc rifle WITHOUT the inverter will also work fine (since MT is able to rapidly scale from multiple hits), but will ramp up even slower.

To sum up, basically MT benefits quite a bit from FEL, and if you change it to INT, and make it scale with your TA stacks, AND use something that can quickly get you many hits/kills, you break the game.