Controller or m+kb

I have been playing m+kb for over a year. I love last word sniper and I basically don't shotgun unless it's duality or chaperone. But basically, I only snipe. I recently got a controller, but the movement is hella tough. What should I use. I feel like I can make the last word twilight oath work on m+kb. What should I run, I am average at the game but since I use a pretty tough to use loadout, my kd suffers a bit so it seems like I'm absolutely dog shit. Also, my back is a lot more relaxed when I am using controller, but my hands are more relaxed when using m+kb. What do you guys think?