To better understand the game we need to understand the different abilities of the cards. If you haven't checked the part 1 of these abilities series. I would recommend you to go and check out by Clicking Here
Ronin
If you are using Single Combat card with 2 other cards you will get a critical strike guaranteed. This card has an attack of 75 with 0 shield.
Imp

Ivory stab gives you 1 energy per critical strike dealt by the team this round. This card has attack of 70 and 20 defense shield.
When to use
Ronin + Imp combo will allow you to do crits and gain energy per crtis. Only use this combo when you have 3 or more energy as Single Combat ronin requires at least 2 other cards with Single Combat ronin for the critical.
1 guaranteed crit with Single Combat ronin and if other cards also crit you gain more energy. If used separately or below 3 energy you will lose crits and won't gain any energy.
This "Rimp" combo is brutal as I have seen in some streams, I wish I could apply it to a beast and make OP combos. Thanks for the info bro, good job keep it up!
Thanks. I'm using it on my axies and it's doing wonders