-Just at first glance, can't have a rote of an arcana dot you didn't reach yet (so space 3 rote for example won't be possible).
-Let see what else, Diplomat's protection is not listed anymore in 2e (which means its still possible to get the spell but probably would need to break it down into reach and the likes, which we can do for 2e) or if you still want to use Imposter, it's available.