I'll be cheering for a high scoring game, Scotland to win by 20+ but both sides to score 4 tries.
ETA: Hang on, no, that'd mean Ireland go home, bugger, looks like SA are already confirmed in the QFs.
Given that, I'll be a little torn in my support - I like both teams, naturally I'd support the underdog, but then, Ireland have a (much) better chance of being the NH team to go deep into the tourney and keep the KO stages more interesting for me. Scotland are more British, but I myself am more Irish (too remote to count for anything).
Re: Finn Russell, as he's a Bath player this season - I want him coming to us happy and confident, on the other hand, it'd be nice to get him a couple of weeks earlier.
ETA2:
For clarification, in the case of a tie between three or more Teams at the end of the pool phase, once the highest ranked Team has been determined following the above criteria, to determine the next higher ranked Team the process would repeat, starting at the first criterion.
So, back to my original wish then, Scotland to win by 20+ but both sides to score 4 tries.