You should be able to calculate that yourself.
You're not saying anything about the FP's bases and how you delay classed them. We can't help you here.
So you need to calculate their true ability: displayed ability * (experts + 4*vets)
You could compare this with the true ability of "regular" fighters that have been classed normally and just BVE'd (boost, 109 vets, full experts). At level 120, the value of the "experts + 4*vets" part for those fighters would be around 866. That value you need to multiply with the displayed ability.