Ancel 1268-1270
The above assumes that advancement is using normal rules for advancement (mostly Exposure in this case).
For the three years after arriving at the school, Ancel begins setting his agenda. First, comes learning the new Hermetic Instruction skill that Elizabeth has developed, then getting that out to his fellow Masters. He has one Tribunal to attend in 1270, but the rest of the time available will be cramming his apprentice for her Gauntlet (which will occur Autumn 1270, with her final Parma Magica training taking place in Winter 1270) interspersed with the beginnings of his Original Research.
Ancel will take the offer to have his lab transported via spell.
From earlier postings discussing this with the Troupe, it sounds like Subtle Opening would be a good one to tackle. Starting now also allows him to leverage his apprentice's relatively advanced state while still here. Referencing this posting: