I don't know. Is that 8 players before or after you add in your huggy alliance with FOOLS Paryl And jager? Saying 8 players is rather misrepresentative.
But away from the banter, the success from an op, at least initially isn't dependent on the villages nobled, i mean any tribe with fair competence should be able to defend mass trains, hence why the initial op hits are usually easily dealt with. What determines the success is whether the weight (rebuild time) average time needed for the defenders to restore troops compared to the attackers, also the qualitative factors such the stress of being attacked. All of which aren't shown by statistics.
So in my opinion, its impossible to discern instantly success without insider info