My advise (and it's a general advise for VtM characters) is that have the other characters think your character is either too dangerous or too useful to be attacked.

It's ideal to find a good balance between both!
-useful but not dangerous=> you are disposable for bigger asset
-too dangerous=> they might go after you if they have a chance just to avoid you coming after them

Also the best way to win this kind of things is information, using auspex, blood bond, presence, contacts...