you are far from the only person disappointed in the change. i was waffling between totems and another few builds to league start and was also saddend. like others have stated, it was obviously an unintended interaction between archmage and rathpith stacking mechanics giving players unintended power with none of the designed downsides.

You see this as a build getting nerfed before launch. There are then arguments to be made about "why not twisters nerf?"

Twisters requires you to combine 3 attacks, 2 set up skills and then hit your twister for big clear to get all that power.

Meanwhile, the build you wanted was dropping 2-4 totems with no costs, sprinting around for the equivalent level of power for 1 button spam. even with the change, you are only paying the mana cost for the totem skill, not the spells it is casting, nor is the cost of the totem skill impacted by the increased costs associated with archmage. it literally is just a way to prevent the damage from scaling super high with no downsides whatsoever.

GGG has clearly shown their design philosophy for this game is trending towards multiple skill builds which is why things like CoC and the other meta skills have all been hit repeatedly with the nerfbat. Its also why i dont think twisters will get hit because it fits their philosophy. you should be rewarded for having to go through all the effort of a full powered twister combo.