This is one where I think everyone will have their own way of working, but ...

For me, if I want a reverb which is only going to be used for one vocal track, I'll put it on a track insert. Usually though, I'll have several tracks of vocals and it's easier, plus less processor intensive to put it on an effects buss and send the individual tracks to it.

Much of the time I prefer to use a delay with feedback for vocals and if there is more than one track, putting it on an effects buss ensures that all the sends get the same delay and feedback.

I usually use reverb in stereo because it sounds bigger, but delay in mono because I don't like stereo bouncing on vocals.

Other than an upward limiter, that's all I use on vocals.

Hope this helps.

ROG.