Some things I do not like.

[Absimiliard]

No. I use the mouse. However, when solo without a tank, I do sometimes hold E while running around a mob and still use my other fingers to case while running, assuming on on smn phase that has instant casts. Basically strafing.

I have a razor death-adder, which has a two buttons on the side. But, I'm retired and can't easily go out and get something more expensive right now. But yes, that's been suggested.

The good news is that cheaper off-brand models tend to be almost as if not every bit as good as their more expensive name brand counterparts when it comes to gaming peripherals like a mouse.