I don't know what the historical winning totals have been but Beale's winning total of 127 last year seems very low.
Considering 22 people vote on a 3-2-1 basis, 132 points are handed out for each and every test match.
A unanimous man of the match performance could net you 66 votes from a single game. Well, let's say 63 as you presumably don't vote for yourself.
Pocock and Barnes would seem to me likely to poll well ahead of everyone else. You'd have to think Pocock will score very close to 63 points for the quarter final against the Springboks at the RWC and Barnes will score very highly in 5 tests against Wales.
Throw in a bit of emotion from the test where he flew back after the birth of his first child and you'd have to think he'll poll very close to 63 points for that match.