Mulligans
General Mulligans
Early on you want to play your minions at tempo. Rainbow Glowscale is your best 2 drop, and Festival Security is great to be played on turn 3 (or coin in turn 2), to take advantage of its battlecry. Life from Death is great to have in your hand as soon as posible, to get it infused as soon as posible, though i would mind taking it away vs aggro decks.
Aggro Mulligans
You'll easily get a 2 drop even if you dont mulligan for it. Street Sweeper would be your savior in this matchup, if you dont get it you'll probably lose.
Control Mulligans
Ill probably would hard mulligan for Life from Death, it is the card that makes you win faster.
Resurrect your spell damage minions with undending swarm to finish your opponent with Moonbeam for a maximum total of 48 damage.
The full combo is Unending Swarm + Solar Eclipse + Moonbeam + Moonbeam for a total of 10 mana.
Since you’re duplicating one of the Moonbeam via Solar Eclipse your total damage is = 6 times (1 + Spelldamage). As your first Unending Swarm can only resurrect up to 5 spelldamage minions, its maximum damage would be of 36. Depending on the match you may want to wait for the second one for the 48 damage.
Life From Death is undoubtly the strongest card of the deck once it is infused, and most of the time you want to duplicate it with Solar Eclipse.
Dinner Performer purpouse is solely to get your spelldamage minions off your deck faster and consistently, otherwise it is a bad card. It is also tricky, you want to play it when you have 5 mana for it to summon one of your spell damage minions. On 6 mana it is up to chance to summon one of your taunt minions (wich is good) or either Kiri, Chosen of Elune or another Dinner Performer (wich are bad). On 7 mana it can also summon Street Sweeper wich is ultimately the worst outcome.
Where are you getting 48dmg? Unending swarm+ solar eclipse + moonfire is 36 damage? Am I confused about any part