[Tifone]

I wouldn't change the victory conditions in Principe, Mithras, at game already started.

Anyway, don't get what I said with the feeling that you shouldn't be honourable by any means, or not have alliances in Principe! Ideally, you could end you whole-game-long alliance just in the end when all the other nations have been conquered, to see who is finally the strongest among you 2-3 allies.

Also, you may be interested in what Machiavelli himself says (Chapter XXI):

" A prince is also respected when he is either a true friend or a downright enemy [...]"

"[...] if the party with whom he allies himself conquers, although the victor may be powerful and may have him at his mercy, yet he is indebted to him, and there is established a bond of amity; and men are never so shameless as to become a monument of ingratitude by oppressing you. Victories after all are never so complete that the victor must not show some regard, especially to justice. But if he with whom you ally yourself loses, you may be sheltered by him, and whilst he is able he may aid you, and you become companions in a fortune that may rise again."