SqueakyBloom's advice for Kitana's Sharpen in Mortal Kombat XL

I recommend using meter on Meter Burn Sharpen since it will last longer and allow for the following combos to reach maximum possible damage.

212, Sharpen (Down Forward 4)

The 212 string can only be followed up by Sharpen, so make use of it. This is the safest way to activate Sharpen.