I admit, I've been dorking about in the practice room with an Esper build playing both Seeker AND Homunculus, which I'm sure makes me some kind of Vintage hipster
Not doing anything particular to get value out of him other than play Night's Whisper, plus Yawg's Will. Just a handy little beater, who also allowed me to cut a land, which in these post-Gush days feels quite a luxury against other blue decks. Not saying it's fantastic or anything, but I like the little blighter. With only one lonely Monk in my deck, I've got to beat down with something...
Baral meanwhile I've been playing in a more controlling Slaver style build, but that's another story!
Only just come back to MTGO after a break over the summer... will run some of this nonsense through the leagues and report back. Happy to admit, The Homunculus is probably more a fun/pet card. But life we would be boring if we didn't occasionally try these things!