Easton's recommended combos for the ACE show; insert + point weight gives a 12-15% F.O.C. balance with Spin-Wing Vanes and 11-14% F.O.C. balance with plastic vanes.

Perhaps getting those ballpark numbers will give somewhat similar performance, however the big killer in drag is surface area(both shaft and fletches) and to a lesser degree, diameter at the point.

The nocks are pretty much a wash as the feltches "dirty" up the air back there already.

If they are lighter, you might get by jacking the FOC a bit more and try reducing fletch area, and using the extra speed, there's a cost to everything though.