There's no such thing. There are decks that people have used to get to 1400e, ut that doesn't mean they'll be of any use to you.
What I mean to say is: a good deck is only a percentage of the battle. Any 1300e deck that's built with the current meta in mind will be able to hit 1400e if you're Lucky/persistent enough to secure that win streak.
Yup. You need to be winning a definitely large majority of your matches, as the rewards for winning are so low, and those for failure so high, particularly earlier in the week. I haven't been able to crack it yet.
"A deck can get you to 1300, but to 1400, it's all skill."
Not it's not. It's a combination of skill, persistence, and luck.
Deck building, skill, and HUGE amount of luck
for example, when I tried new deck (5-4-4-3-3-2-2-2)
I get 3-2-2-2 draw and my opp 4-3-3-5
or when you use Freaks, you against SOB clan again and again
or when you use fang pi, you against +/- attack clan, etc