Working in a SoR+fate egg combo, for the highest damage and as fast as possible,
3 towers+1 nova+egg+SoR//or//2 novas+1 tower+egg+SoR//or//3 nova+mutation+egg+SoR=
so far, 2 12/6 black dragons 1st turn,
2 sky dragons first turn, 2 jade dragons 1st turn.
and still you want a buff.
When dealing with a card that involves a random chance on should
NEVER balance based on the the best possible outcome. Yes, the deck you show will
occasionally get out a LOT of damage on the first turn, but that's nowhere near the whole story.
First let's look at how likely the combo is to go off:
-You have to draw the entire 5 or 6-card combo very early on (first or second turn) or it doesn't do you any good. This is doable IF you devote the entire deck to this combo, but there will always be a higher chance of "bad draws" with a deck like this (draw all SoR/no eggs etc).
-Even if you get the combo out first turn it only gives about a 25% chance of getting out the massive damage you're talking about (I didn't run the math on this, but I know on AVERAGE you get somewhere around 4 damage from a fate egg--so most of the time when you pull off your combo you'll have about 8 or 9 damage out turn 1.)
Now let's assume you DO pull off the combo and land 2 dragons on the first turn:
-This is not the automatic win you seem to think it is, yes it's impressive, but a decent control deck should be able to shut that down. In fact the entire combo can often be shut down by your opponent
playing a single card (RoF, Antimatter, Pand--just to name a few).
-You aren't going to be doing much of anything on your next couple of turns. Since you just played 6 cards from your opening hand it isn't at all likely that you'll be drawing the combo again soon and the individual cards of the combo are not at all strong on their own.
-The odds are against pulling the combo off once. It's even less likely you'll get that lucky twice in one game.
What happens if you DON'T get the combo:
-The only cards you would want to play if you can't put the whole combo down at once would be the towers. Playing fate egg without SoR is just begging for the enemy cc to eat you alive, SoR CAN'T be played without a target, and while nova you could sometimes get away with playing it early is inviting trouble from black holes, singularities etc. Thus you end up with almost an entire hand of "dead cards" you can't play.
One last note:
-Even a brief glance shows that the power of the combo
is not coming from fate egg. Fate egg on it's own would be a full turn slower, less quanta efficient, half the damage output and much more vulnerable to cc. SoR being a strong card does not make fate egg any less weak.