"Less than a 2x difference is extremely minimal"
No, a difference of 1.8x is considerable and enough for Tai Lung to kill Blake very quickly CQC, when he has that advantage, an absolutely massive skill advantage given he's trained all his life in multiple forms of martial arts, likely including disarmament, while Blake's training level is unknown.
Tai Lung takes this, mid-low difficulty. You people are overestimating the advantages Blake has
-Her dupes might be useful, but Tai Lung would eventually figure out the shadow dupes and would easily break out of the one that could immobilize him (A la Torchwick)
-While she does have superior range, that doesn't matter because
A) she never fights exclusively at range, and always has gone CQC mid-fight, often more than she actually uses ranged attacks. And when that happens, she's going down fast and hard
B) She's not cunning enough in battle to stay at range until she figures out Tai Lung's power compared to hers.
-While she does have more versatility than Tai Lung, being versatile doesn't matter against someone who is stronger, more skilled, and more dangerous than you are.
Also, Tai Lung is a considerably smarter fighter than Blake. He has used enemy attacks to help himself (such as breaking out of his chains by simply putting said chains where the arrow was going to hit), and is quite clever at using the environment and objects in it to his advantage (his breakout and his fight with the furious 5 being examples
Lastly, upon rewatching some fights for both, Tai Lung is honestly more dexterous than Blake.