Playing with the Duel of magicians variant tonight. If I link one of my tricks to a neutral gray markers on the performance card, do I get a bonus for linking tricks? If yes, and since you get the bonus from the level of the trick you're linking to and not from yours, which level bonus?
Yes, you get the linking bonus - that's the purpose of those grey markers (well, that plus link bonuses in the performance itself).
However, you have made a mistake - when you place a trick and form a link, you get the bonus from the newly-placed trick's level, not the existing trick. Which then resolves the question about what level to use when placing a trick that forms a link to a printed marker