So, this deck was originally built for my girlfriend, but I have been playing it more and more and the deck is just nuts. The +'s this deck can produce is completely nuts and the OTK ability isn't too bad, mainly due to Ultimate Offering.
Madolche Magileine - Best searcher around. Searches herself or any other Madolche monster. Madolche Messengelato - Best S/T searcher we have. Running three of this and three Mewfeuille means plusses all over the shop and when you combine it with other cards, oh the fun. Madolche Mewfeuille - Free special summon that works well with other monsters in the deck? Yes please. Madolche Cruffssant - Only two because, while it is useful to have a 2300 beater on the field (with Chateau out and effect used), two is enough. Madolche Butlerusk - Don't get his effect off that much, but a 2k beater, so why not. Madolche Marmalmaide - 2500 defense can be a nice thing and can be useful when you want yoru S/T back. Fossil Dyna Pachycephalo - Because we don't need to SS at the end of the day, we can just beat them down. This card stops so many decks, it is amusing to watch them squirm. Malefic Stardust Dragon - At one it is very nice, saves Chateau and just beats them down.
Heavy Storm - Thinking of taking this out and replacing with a third MST or a single Night Beam. Double Summon - Great card in this deck; if I had space for another, I would put it in.
That is the deck and it is fun. I will have some videos up and in this post in the near future of duels, so you can see how the deck explodes and makes your opponent cry.
Deck is a bit all over the place. Defensive Traps are not robust enough for this deck to stall for time, especially since you have 4 on-attack Traps and 2 Dark Bribe. Marmamaid seems a bit random. The rest is probably ok ... mostly standard? I haven't looked at a definitive list so I do not know if your card ratios are off but 3 Magileine and 3 Messengelato are definitely fine - I like triple Cruffssant but that is just me. 1 Fossil Dyna and 1 Malefic Stardust seem ... badly thought out. Why not run 2 Tragoedia instead (or simply go to 2 Fossil Dyna)? Especially because this deck really likes Tragoedia. Alternatively, go to 2 Fossil Dyna or 2 Malefic, but I'd recommend 2 Fossil Dyna instead of 2 Malefic if you don't run Tragoedia.