ok here are some more
Terra from Teen Titans: Using the earth to hold you as she tickles you helplessly
Azula, TyLee, and Mai: Azula has nails that I fear would drive you nuts, TyLee can pretty much make you unmovable to tickle you helplessly, Mai can pin you with her blades then tickle you helplessly with her nails too.
Android 18: she can be pretty vicious as a Ler i believe with her strength
Cheetah: A super fast female villain with claws to match.
Enchantress: A Asgardian from Thor who witch powers can be deadly if she wanted to tickle ya
Star Sapphire: With powers similar to Green Lanterns, she would be deadly
Madame Viper: she looks like a mistress to me
Regina from Once Upon a Time: if she was a mistress, she'd be deadly too
This is a great list!! All for terra and star sapphire, and oh man I didn't even think bout once!! Great show!! Lotta lees and lers there!