This must have been done, I'm sure, but I can't find the code for the Shard of Focus, so can't search for it. Anyway:
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4ti 5f0 5f0 5f0 5f0 5fb 5fb 5fb 5fb 5fb 5fk 5fk 63a 63a 63a 63a 6s2 6s2 6s2 7dr 80b 80b 80b 80b 81q 81q 81q 81q 81q 81q 8po
It'll be much more effective with more Upped cards, and with more Nymphs, but it's pretty good as it is.
Part of the fun in playing it is in finding the balance between Twin Universing your Shards and your Nymphs. In general, though, I'd say to only build one Shard up from scratch and if you're going to Twin it, Twin it once it's got 20ish ATK. It's generally better to Twin the Nyphs because, if you've got the quanta, then 3 of them means that you can constantly use Accretion and take away the added HP every turn, while simultaneously adding 15-18 ATK.
I've only tried it out on AI3 so far, but I'm sure it'll play more difficult leagues, particularly Upped. Stats:
Lose: 2
Win: 8
EM: 0
ATTW: 10.6
The quickest game was won in just 7 turns, so it's a pretty quick deck.