I like combining achievements, so I knocked a few out in one shot, which is easy to do in a Player Match with a friend.
You're going to need something to swap creatures, and something to sacrifice them.
Make a white/blue/black deck. Use any Angel (except Baneslayer Angel, which has Protection from Demons), Shadowborn Demon (B) and Switcheroo (U). That means you can use Angelic Accord to make token Angels as well. I recommend Seraph of the Masses for reasons I'll explain in a minute.
Once you have the Angel, use Switcheroo to give the Angel to your opponent. (You could use the red Act of Treason or something similar to swap creatures, but Switcheroo is permanent so you don't have to do everything in one turn.)
When your opponent has the Angel, cast Shadowborn Demon to om nom nom the Angel you gave them, and you'll pop the Angelbane achievement if you don't have it.
Then, if you have fewer than 6 creatures in your graveyard, during your next upkeep you can sack the creature you swapped for your Angel with Shadowborn Demon to pop Insult to Injury. Otherwise, you can use something like Jalira, Master Polymorphist (U) or Fling (R) to sacrifice the creature as well.
Now, for advanced boosting, use Seraph of the Masses (W) for your Angel. Then throw in a lot of small creatures or creature generators. (Angelic Accord would work well here, or anything that makes Goblins/Saprolings/whatever.) Once you have 20 total creatures out, you'll pop Divine Choice.
Lots of ways to do this, but I try to be efficient. (If you want to use real creatures instead of tokens, you can get Grateful Dead as well if you start sacking them or let your boosting partner kill them.)