Being completely honest, I didn’t even understand those numbers of yours. What I understood, and please, correct me if I got it wrong, is that you want to know if Roar and Crouching are two separate bonus or if the multiplier is additive… or something like that. Haha.
Well, I can’t give you answers, I can only give you data and my guess on it:
Tested on Red Grievous Wheel (lv. 412)
Physical Attack: 2305 - 2318
No buffs
Crouching: 9960~9990
With Roar
Crouching: 15019~15900
With Smoke Grenade
Crouching: ~19800~20000
With Roar and Smoke Grenade
Crouching: 25000~26000
I think they’re two different things mashed together, I can’t explain it, thats just how I feel (so, it has no value in this discussion )
Hope it helps you, somehow!