[small-ish necro? -- hopefully this is an excusable case relating to tasks I am tackling for Phase 1 of 10th Trials of Death]
This thing is decent fun - for a player that did FG grinding before the days of Firecell, such as I am. JCJ, you have some good ideas and I would concur that upgraded is the way to go to make it really "functional".
Other than they play for free and hit for 5|0, I'm not sure Ball Lightning is the only "best choice" here. I've modified to use Ray of Lights in place of the Ball Lightning (JCJ's version) which has helped in a few situations where I was seeking Supernova (they are not a mulligan-trigger!) and the RoL gave me
quanta to use on a Sundial or two to draw into a Supernova.
The trade off being -4 attack value but this only comes into play if you were getting to leave a BL in play anyways (I have not found myself with extra RoL on the board for this to hurt the deck's attacking).
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6u3 6u3 6u3 6u3 6u3 6u3 6ve 6ve 6ve 6ve 6ve 71c 71c 71c 71c 7an 7an 7an 7an 7hi 7hi 7hi 7jp 7jp 7jp 7jp 7q9 7q9 7q9 7q9 8pk
As I try to do every time I do deck posts on the forum, here are some in-action final winning turn screenshots: