The reason I split my efforts was because I had an army close to your border (and your VP) who would not have been able to make it to any of Jurri's VPs before the game was decided. I figured I had a pretty low chance of taking the VP (I pretty much figured on heavy fire magic, though even still that was more than I expected). I thought though that if I caught you completely unexpectedly there was a small chance you might not have much in that province (didn't know if it was your home province) and I could hold it for the turn or two just long enough to get the VP for the year...which if I had been able to capture the two VP from Jurri would have put me in the running to win the following year. If I had managed to get those two VPs from Jurri it would likely mean his back was broken given the amount of people warring with him, so at that point I'd have a year to send the bulk of my army down to engage you. That's the way I hoped it would play out anyway.
I sent my pretender to 78 for fun, though I will note that some of the gear I would have equipped him with got equipped instead on a Jarls who aren't on a labs (eye shield, boots of quickness, amulent of resiliance, copper plate).