If they did not follow the rules, they would be more obvious to everyone and likely not as effective.

Poison, blades, projectiles whatever is most effective. One time we used a snake to kill a Queen.

Let them take the lead, and if you need a cover story for being gone... however long you have been use me. As far as I have told anyone I have been in the 'north' on business for the past decade and out of touch with events.