I tried the "original" deck with one with one burning tower replaced by an Explosion.
I couldn't reach the 64 %, don't know if it was because a lack of luck or skill (however, I used an Excel-sheet to calculate the damage so I'm perfectly sure I didn't launch the fireballs too early or too late).
My main cause for loosing was the sundial chain being broken - mostly not because a lack of light quanta but because of a lack of sundial
Especially against Hermes and Gemini I had to play the first sundials early (because of early creatures) so that I lost a lot of games because of that problem. I think a SoG would be helpful to face that problem.
I didn't make exact statistics to what causes I lost, but perhaps some will find my remarks helpful. First, my results:
God Won Lost Win Percentage
Chaos Lord 3 2 60,00%
Fire Queen 4 5 44,44%
Gemini 7 4 63,64%
Graviton 8 4 66,67%
Hermes 2 5 28,57%
Incarnate 5 1 83,33%
Miracle 11 2 84,62%
Morte 3 5 37,50%
Rainbow 6 7 46,15%
Scorpio 4 6 40,00%
Seism 4 2 66,67%
57 43
As you can see I have different win rates against some gods than QuantumT.
As I played only a few games against Chaos Lord I'm not sure if the Explosion really help against him, nevertheless I have a slightly better win ratio.
I had a lot more problems with Fire Queen, caused by her weapons (exploding doesn't really help) - and you need to slow down sometimes (you face the whole 200 because of the feral bonds) to get enough quanta which results in some problems with the sundial chain. For those reasons against her QuantumTs version seems to work better.
As I mentioned before, Geminis Phase Recluse are a problem - besides a SoG it might help to play the first sundial one or two moves later.
There's no big difference for Graviton, almost the same results.
Hermes caused great problems with the sundials - a SoG and playing the sundials a bit later might help.
I only lost to Incarnate once because of a bad draw. I don't know if I was more lucky or if the explosion helped (exploding his last bone wall to clear the way for your Fahrenheit for example) - nevertheless I got a better winning ratio.
Miracle's quite easy - you only have to pay attention when you FB and need to use your shield - I twice aimed at Miracle with the first bolt (but nevertheless won those two games). An early dragon and Morning Glory might force you to play your sundials too early - that's how I lost the two games.
Morte: Well, I won some games, could use Explosion here.
Rainbow: You can loose to him because of not enough quanta, the sundial problem or him causing to much damage with his Eagle's Eye (I onced even lost because of a Thunderbolt...) - nevertheless approximately a coin flip if you win or loose, so it's often quite exciting to face him.
Scorpio: QuantumT said everything there is to say. Mostly lost because of the poison, of course.
Seism: I played fewer games against him, lost two of them so the win percentage ist lower, so it's hard to say if that was only bad luck or the missing Tower - nevertheless I won more often than loosing to him, too.
General: Of course a lot depends on when you draw the cards - sometimes I was lacking Towers, sometimes sundials, sometimes Fahrenheits, sometimes I couldn't draw the extra card because of two many FBs and sundials in my hand, so you can still loose against every god.
I don't think that a second light tower is required - it might help in some situation, but most of the games are so close that the additional burning tower makes a difference - nevertheless, as explosion didn't give me a higher win ration to most gods, you might try the tower instead of the explosion.
As I said, the games are close (btw., not 172 but 162 quanta are required with 4 lances) it really helps having an Excelsheet or something similar next to you to calculate the damage - the formulas quite easy so not much effort to make one.
And, as QuantumT said, they are faster than Rainbow decks - you sometimes have to think if you play sundial or draw the extra card, but most of the moves it's a no brainer.
And of course that deck is gread against T50 - you might even slightly adjust it (adding a third Fahrenheit, a purify or the second light tower) so that you can face some decks even better.
It's impossible to get Elemental mastery with that deck against gods.
(if you find any spelling mistakes take them as an early christmas present
- it's late and I'm no native speaker)