[Oscarmike247]

Figured it out. Its actually much more simple than we thought.

Make a pre-mission event to set var1 to 1.

Use wac script.

If piskills(v1) then
Inc (v1)
Inc (v2)
Endif

V1 is number of kills needed to trigger which will always stay 1 ahead of current kills. V2 will reflect actual number of player kills.

If you need to reset or set number of player kills, simply set v2 to 0 or whatever number you need.

Just tested and it works perfectly.