the simplest thing for this kind of tracking is to add 2 audio tracks with same routing and settings, the first one for example named"voc monitor" is for monitoring only(only monitor button is activated rec button not )
the other one is for the actual recording ’ which only armed with recording and no monitoring trough it.
now you can set the input level as you wish and set the"voc monitor" track volume and actual recording/playback track level freely for performance balance