Taking off from Taxiway if not endangering others is fine on my server.
Sometimes I use Azimuth reduction but I find it better to use full width because im not restricted which direction to turn if i need to start using evasive maneuvres. Especially A-Poling.
I dont have a preferense RWS TWS. Depending on the situation. If there are friendlies in the middle I trust RWS better. I probably stay in RWS if I already have a good idea of the Situation ahead.
I am aware of the TDC indicating what altitude the radar is scanning. We all lose lock at some time or another.