I've met some very good Lithuanians, or people not politicians so from my perspective I'd rather go with them rather than Greeks. Greeks are concerned about their own interests, more or less granted they've helped the Serbs in the past but they arent looking to immerse and ally themselves with the Slavs last time I've checked. Their philosophy is to maintain or sustain Greece, since they dont have any blood brothers.

They're adopted ;D they are quite pro-east and get along with most of their Slavic neighbors. We've had mutual enemies for centuries so it brought us closer together. That's one of the reasons Serbs and Greeks feel like they're related, because of common goals- freedom.