I would say depend...I mean void and troll are buff but all you need is od ult and it would kill both of them since they both don't have int or life. Luna is buff too but same as the other I mean OD if farm and lvl 25 will rape any hero with no int. I mean BKB and +400-500 damage with an imba ult.
I would say how far in game. Early game void and troll are useless but late game they are crazy depending on which hero they are against. Same with jugg, if jugg take them 1v1 no creep he can just ult rape them too. I mean early games wise there's a few that imba, Zeus, and most int hero are unfair. Late game wise there's a few and those are the one that arex named. But I would say OD if you get BKB, you cant stun or sheep her and she does over 500 damage per hit and that's not including her ult.