Recently I've come across some videos of 2* Lady Deathstrike taking on 6* r4 champs and doing some nutty dmg. People in the comments are all raving about her dmg output and saying she'll be nerfed soon. Here's the thing though: her dmg does NOT scale like a normal 2* to 6* or 7*.
LME. She is an outlier because her dmg is mostly based on her ruptures, which scale with her armour rating. Her rupture dmg will not increase or decrease even if her base attack rating is altered. Armour rating does NOT scale at the same rate as attack rating, and that's where I think a lot of the misconceptions might be rooted. Unlike her base attack stat, which goes from 98 [2* r1] to 3843 [6* r4], her armour up buff only goes from 228.57 [2* r1] to 314.29 [6* r4], with each armour up passive further increasing it by 177.78 [2* r1] and 244.44 [6* r4]. Not as steep of an increase as you might think...


When we factor in her base armour rating of 103 [2* r1] and 658 [6* r4], her max armour rating would be ~1576.03 [2* r1] and ~2683.37 [6* r4] (max = base armour rating + armour up buff + 7 armour up passives from the sig ability). That would be ~70% increase. Technically, it would be slightly higher with the additional 2% rupture potency that sig 200 [5*/6*/7*] has over sig 99 [2*/3*/4*], but I can't be bothered to get the exact value lol.
Now, when we compare that to Human Torch (who also relies on DOT mostly but scales off attack rating instead), taking numbers from Auntm.ai (my torch isn't r4), he goes from 16.8 incinerate dmg over 3s [2* r1] to 688.6 incinerate dmg over 3s [6* r4]. Just taking those raw numbers and discarding his smoulders/pre-fight, we get an increase of ~3998.8%. That's a pretty big difference I'd say, between 3998% and 70%.
She still deals a decent amount of dmg as a 6*, not saying she's a complete noodle, just making this post as a 'The More You Know' kind of thing, as people might not be aware.
TLDR: Lady Deathstrike does not scale like other champs in the game; seeing her dmg as a 2* in certain videos and expecting her 6* version to deal exponentially more dmg (like regular champs do) might not be the best idea.