Devourer + ruined king
Once you get ruined king and sated devourer there is no stopping you, unless your team is already far behind. This is coming from someone who abuses it all the time. Like seriously, ever tried it on trundle? (he can literally 1v3 with 5/3) It works really well on xin and yi, too, but the low defense they get in the early game can really fuck them, unlike trundle and his op ult and amazing escaping potential.