Just wanted to clear some things up.
Cloaking works like this (it is the 1.5 at the very beginning)
(((Attack stat * 1.5 + skill damage) * T0 - defense) * crit + crit atk + element + monster damage) * T1~3 * enhance attribute + bonus
For example.
A musketeer with 1k base attack using snipe will do:
((1000 * 1.5 + 6000) - defense) * (1.5 if crit) * 400%
= 30k ( or 45k crit)
Without cloaking, it would do these numbers instead.
= 28k ( or 42k crit)
Also, 75% defense reduction on the monster with the highest defense (789 defense) equals a tiny ~581 more attack. It will be amazing once we get monsters with extremely high defense. It is also a lot better to reduce defense for multi hit skills.
