Make 20 cards deck, take out the etaqua and 1 kuriboh and put another supremacy berry... also, in my opinion, take out the sangas and put 2 Joan for more lifepoints and strong attack.. Also flame ogre instead the buster blader for draw a card
Drop Stray Lambs and Sanga. Add: 2 more Endymion (2 Joan if you don't have it), 1 or 2 Doube Summon (if you choose 1 then I'd put a card removal like Wild Tornado, Nobleman of Extermination...).
I'm assuming you don't have the third Supremacy, if you have swap Dian Keto.
As long as the 🔥ous HHG harpies and burn decks are getting Kog, then why shouldn't 3sd.. My primary is a Gravekeeper and a bluff trap deck with which I had previously reached Kog, but 3sd is just fun to play.. You either win or you lose pretty quickly
I have the 3rd supremacy berry but I think its inferior to dian keto as it needs your lp to be lower than your opponent's which is almost never the case after you hit them with a lvl 7 monster