is it possible to do these things in the genie editor?

Is it possible to increase the tribute fee above 30% (e.g. set a tribute fee of 50%)?

Is it possible to have different tribute fees for different resources (e.g. have a higher tribute fee for food)?

Is it possible to use annex units to modify a building to add archer fire? Specifically I was thinking of a UT which would add a "second volley" to a castle, which fired a large number (e.g. 8) of 1 damage arrows at a slow rate (e.g. 5). In this case the castle essentially would have 2 attacks (1 which fires every 2.03 seconds and 1 which fires every 5 seconds).