Even though PGA and Mackenzie are both owned by PGA they don't have alot of overlay. The Asian Tours and the European/European Challenge Tours are independent of each other. However at the beginning and end of their seasons, they have a lot of double counting events (events that count on both tours money list), somewhere between 8-12 depending on the year. The European tour also has double counting events with the Australian and Sunshine (African) Tours during this part of their schedule as well.

If you happen to win one of these dual sanctioned events, it counts as a European win and you can get a European Card that way in Categories 2-4 depending on the type of tournament.

The winner of the Asian Tour money list is in Category 16 on the European list the next year.
The next five (#2-6) come in at Category 18 along with #112-127 on Europe list and #16-30 on the European Challenge List.
Vincent was in Category 22 from his placing at Q school and still managed to play in 16 European counting tournament so far. Even if he finishes dead last this week he will be at least #140 on the European List which is Category 19. But if he can stay in the top 6 in Asia he would be in Category 18 next year.

Most mainland summer tournaments the cutoff is around Category 17. So unless you win a double sanctioned tournament or win the Asian money list, you are in a limbo situation like Wagner in the US, where you will get starts but they won't be in the big money tournaments that would help you move up the money list. So you are stuck playing mostly Asian tournaments and whatever lower level European tournaments you can get into.