I have been tempted to buy another controller (old one broke from overuse lol) just for ZITHER! He is soooo much easier on controller
Used / refurbished / last gen ones should be cheap. I'm using my old xb360 controller. Of course you're free to buy new ones too. Its your money.
You play Sara on controller at all? The leap is easier to use on her with controller, and she generally doesn't have to target too much given she just bursts everything. Silent sister Spinning blades is easier to control / move around too during the animation, since it response to movement inputs too just like AL and FS during its animation.
Of course on Zither I just spam hot licks a lot of the time on Perilous. There aren't a whole lot of fire resistent enemies outside Qunari & Dwarf faction, who just die to PC anyway.