I tried to create a small rainbow, that either fails fast or wins quickly.
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4vm 5c1 5fa 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6u3 6u3 6u3 6u3 6u3 6u3 71b 74b 74b 77d 77f 7ba 7do 7do 7k2 7n3 7q5 7q5 7t9 7t9 80h 80h 80h 8pj
It works really well against lvl5 and is capable to win against the FG (not as good as a deck that is constructed for that purpose).
The key card is quintessence to protect your control cards and 1 damage dealer. Protected cards don't count against the 3 creature limit for area spells like firestorm or pague, which allows you to have more creatures on the playfield.
I would use more shards of gratitude, but I currently have only one. The miracle and heavy armor may be replaced for that. I also tried a single epinephrine in this deck (works great on the queen or the druid, esp. if you directly protect them with quintessence) with good success but finally decided for the miracle as general purpose healing and to counter poison.
Oh and I use falled elf instead of druid. I prefer the crature control (dragons) over the army of mutants, as you don't have time for that with a small deck like this.
Please add your comments or critic. Any hints on what to improve are welcome. I just want to stick to a small deck for speed.