Hearthpwn

This deck list with -1 overflow and +1 Chef Nomi has been so good for me. It’s farming gold in the tavern brawl and the most important part, it out values control warrior late game. Last warrior took me to fatigue and I played three chef nomi’s. This deck is so good early, mid and late game just my experience anyway. Zoolock and tempo rogue are hard to beat if they get a good early draw, but if you stabilize around turn 6-7 you win. 

For me Elise and zephrys make this deck too. It’s cool how much value they can give you late. This will be the druid deck I push to a golden portrait because it is wrecking other decks in the meta and it is so fun to play. Different than how most people play quest druid as well. It’s not about completing the quest, it’s about keeping board control.

If this deck wasn’t so dang expensive I’d recommend everyone play it. But if you can play this deck (also my opinion is again -1 overflow/+1 chef Nomi) i’d highly recommend it.

Does the quest worth crafting? , not yet decided between this or rogue quest

Quest Druids winrate has been a few percents (~3 atm) better since day one.

So if Quest Rogue is your only other consideration, i'd say it is worth crafting.

Elise the Enlightened and Zephrys the Great can create eternal value loop with Flobbidinous Floop?

Not really: the loop can only continue, as long as you don't play any other minions outside of Elise and Floop who copied Elise. The second you play the first Zephrys (or just any other minion), both floops (no matter how often you used elise/floop copying elise, you always have 2 floops in hand) copy that minion, locking you out of Elises for the rest of that game, stoping your value loop. The other problem is that when your hand is too full to copy anything, which cards you get and which not is rng, so if you dont get the Floop copied, the loop ends as well, with no new oportunity to play Elise,after the next one, because she is the last Flopp you have. Something to note about how Floop gets copied by Elise: let's just say you play an Oasis Surger into Elise in a turn with Floop being the only hand card. The cards left in your hand at the end of the turn are 2 Floops then, but: the original Floop copies Elise, the other one the Oasis Surger because: Elise is played, the Floop gets copied while being still Oasis Surger, then the orignial Floop becomes a copy of Elise, then the Floop copying Osais Surger gets added to hand (this jank happens because cards being played, so Floop copies them, but their Battlecry happens at the same time somewhat). Next turn when you play the Floop who copied Elise, you will have one Floop copying Elise in hand, still one who copies Oasis Surger (cause when you played ELise the Floop in hand was "Oasis Surger Floop", turning into Elise, but another "Oasis Surger Floop" gets added to your hand) and 2 copies of the card you topdecked that turn (if you're not in fatigue).

Who's on first?

I don't quiet get what you are asking for sorry :/

What's the purpose of Elise the Enlightened and Zephrys the Great if this decklist has 11 cards included twice?

In case you don't know Highlander cards can still work even if your deck does have duplicates, since as soon as you draw one of each of them you will be able to use both Elise and Zephryrs. Considering this deck has quite a decent amount of cycle with Overflow, Nourish, Wrath and Anubisath Defender you will get rid of the duplicates rather quickly.