This card over here is so overlooked, its crazy, the value it gives you on low elo is AMAZING.
Why Onyx sentinel? because it has shield lvl 1, 6 hitpoints and NO DMG
the no dmg part is importan because it means that the card stats are more efficient at taking dmg,and in case we are dealing with any tank that has torns we wont recive more dmg.
So the composition i am using right now is:
As you can see we use Onyx's sentinel as a tank and then use all the mana we have left with cards that have melee dmg and sneak/opportunity abilities, this way we evade any tanks that the bots usually use while destroying their backline, and in the end all the dmg we have is focused on the bot' tank.