Turn shades into units, and units into other units.
Most of the units have relevant summon abilities, and corrupted units can be sacrificed twice (to Keelo, or other sacrifice effects)
The best abilities are on 3-4 cost units.
You will often want to wait until you have 4-6 power before playing Keelo, and then use Keelo to turn a 2-cost corrupted unit into another Keelo + a unit of your choice.
FJS display gets back dead Keelo
FPS display helps you find Keelo (or whatever you need)
Early on you want one of each influence. eventually you want FFFJJJPPSS, but most of that is for one-of cards, so it isn't too important.