While I don't have her, facing her in arena III has been a major PitA for my team. The other team basically have 3 glass cannons that does enough damage to my team, I wipe them out, leaving Deathless. I get wipe by a 40k+ AOE from Grim Revenge.   If I single target kill her, then the 3 glass cannons takes me out in 2nd round.  I tried multiple combination but could not take that team out.

While I don't have her, facing her in arena III has been a major PitA for my team. The other team basically have 3 glass cannons that does enough damage to my team, I wipe them out, leaving Deathless. I get wipe by a 40k+ AOE from Grim Revenge.   If I single target kill her, then the 3 glass cannons takes me out in 2nd round.  I tried multiple combination but could not take that team out.

She is made for arena.  You need high defense and high crit damage. Ignore CR since that is guaranty with GrimR. 

The AI is kinda wack. It seems to use the most powerful AOE first.  You have to make sure she goes last, and keep her slow enough so that the other team went (and killed your other allies).   I believe because she is a defense base, she would survive the first wave. It's a delicate setup.

Kuno said:

The AI is kinda wack. It seems to use the most powerful AOE first.  You have to make sure she goes last, and keep her slow enough so that the other team went (and killed your other allies).   I believe because she is a defense base, she would survive the first wave. It's a delicate setup.

Basically, try to get your 3 glass cannon toons to go first to buff/debuff/aoe, and then get drop by the other team. By this time, their shield is down and are at 1/2 HP or so. She then goes last and wipes them out.

It would be great if they could tweak her AI.  On offense, I prefer to give her a modest amount of speed.  She goes 3rd in turn, and still usually before the other team (at least on silver I that I am at so far).  Reason I like her up there is I lock an opponent down with [Vile Insults] the first turn.  Then, depending on if any of my allies are dead, how low the opponent's HP is, etc., I will usually blow [Grim Revenge] on 2nd turn with her.

The thing that sucks with my defense is that it is hard to know what she is up to when I am not around keeping an eye on her as far as defense, lol.  Thinking mostly defense with a little speed would be good on her though, as the extra speed and upgrading her skills would make Grim pop back up after 5 turns, which might make a second hit viable in a survival fight.

The only effective use of her that I ran against, was to go last in her team, and after my team kill her 3 teammates.  You only need her to use Grim Revenge once, to wipe the other team.  Sitting on gold 4 on two accounts, I can tell you that in arena, the 2nd round doesn't happen as often. Also since ur not focus on speed and crit rate, you can focus on def and crit damage to maximize damage of that single attack.

There are at least two champs that benefits from the slower speed, her and executioner.  For executioner, you want his retaliation to activate more than his turns.

I don't how effective she is elsewhere, but from arena, it was mind-blowing.  Thinking I was for sure going to win with 4 allies left and one enemy with 25% life. But BAM. I lost. over and over.

Penya said:

Yeah, some chars are waiting reballance now. Maybe devs will reballance some chars (Astralith is 1st in list as i know xD) after update game to 1.8 and fix all new bugs. They just need some free time for it. 

Astralith and Tomb Lord.  He is horribly broken.  His skills contradict one another, hits like a common, and sadly, he was the very first legendary I ever got.  I tried using him a few times in arena back then, until I realized he was more worthless than an uncommon, and shelved him in my vault.