Here is my Guide to get an S-Rank in 2 turns (and 1 minute!). You can use 1 controller for this (Highly recommended) method if you set the characters used to the same controller in deck selection (before the battle). First I'll start with the cards needed. Put them in order from top to bottom.

Use Orland as the attacker
-Black King Bar(or you could use Chain Sword)
-Guard
-HP Attack
-SW Attack
-Stab
-Then fill the rest of the deck with anything

Use Any character made to lose (must be dark side)
-Rappy
-Fill the remaining space with any cards

Before you start, you need to create a character that is made to lose (this is also good if you have a character to level up by making a high level character lose 70 Experience). Next, create the decks(make sure you make the cards in the deck in order when you create the deck or you can't do this S-Rank trick) and go to the order option on the upper-right of the screen in deck selection if you aren't certain it's in order.

GAME- Choose Unguis Lapis A then set the rules to 6 min roll and Deck Unshuffled. I find it easier if both characters are on the same controller. When the game starts it doesn't matter who goes first.

Losing story character- Play the Rappy (summon the rappy infront of your oponent) move as far forward as you can with your story charactor then end your turn.

ORLAND- Use Black King Bar.

Losing story character- Attack once and block it.

ORLAND- Use all the action cards in order(HPattack, SWattack, and stab) then attack (don't Guard with Losing story character)