It's not too complicated user.
The obvious ones, like you said, are Karmic Guide and Revilark. Throw them down with a sac outlet and boom, infinite ETB/LTB triggers. This is why Zulaport and Blood Artist are good, but not necessarily early game plays.
The other ones interact with Ghave himself. Like the other user said, Ashnod's + Hardened Scales/Corpsejack/Cathar's Crusade/Mazirek/Juniper Order Ranger + Ghave is an infinitely large ghave, as well as infinite ETB/LTB triggers, and additional effects, depending on the token producer you're using. You need one open mana to start things off, but you pop off a +1/+1 counter from Ghave to make a token, sac the token to make two mana, pop another token off Ghave, sacrifice it to Ghave, add 2 +1/+1 counters to Ghave, which leaves you with 1 floating mana to pop off another counter and keep things going.
Pupetteer Clique + Sac Outlet + Cathar's Crusade lets you pull someone's entire graveyard, as well as giving you infinite triggers and an infintely large board state. If the sac outlet is Ashnods, you get infinite mana, if the sac outlet is carrion feeder, you get an infinitely large creature, and if the sac outlet is nantuko husk, you also get an infinitely large creature, but only for one turn.
Carnival of Souls + Ghave + 1 open mana lets you take every single counter off your board and make them into a tokens, at the cost of 1 life per token, but will kill you if you aren't careful.
A lesser known one is Crystaline Crawler + Token Producer + Ghave. You pop a counter off ghave to make a token, sac the token to ghave, put 2 on crystaline crawler, and then you have infinite ETB/LTB triggers.
Now, if all THAT fails, literally just ramp, slap down avenger of zendikar, and win. Or kalonian hydra. Even just wrathing the board then dropping one of these fatties should be pretty good. I think the important part is knowing what combos exist, and what things you should prioritize.