Recovery code method.
5* Elita, Warpath, UM, Windblade, Perceptor, Optimus Primal, Arcee, Sludge, Prowl, Smokescreen
PLUS 5455 5* shards, so there is one ready for you to pick from the batch of your choice!
Maxed 4* Victorion, LVL18 4* Optimus Maximus, LVL9 4* Superion, LVL1 4* Defensor (recently unlocked).
1 million Combiner Spark. I was going to upgrade OM, but wanted to give option to new player.
3.6 million Spark
1.3 million COMBAT Spark
It's easier to list the 4* I DON'T have:
Slug, Tracks, Impactor, Warpath, Optimal Optimus, Dinobot, Snapdragon, Lightspeed, Doubledealer, BW Silverbolt, Hound VAMP, BW Prowl, Inferno, Grapple.