The numbers for a Crusader are honestly not easy to follow and my calculations weren't well documented so I can't find the exact difference, but the end result is:
SB+FA+Coma > SB+Coma.
PS+FA+Panic > PS+Panic.
For WKs single target damage is extremely important because their mob range sucks, leaving them attacking single targets a lot of the time. Can't say if that's the same for Crusaders, since they can hunt Gobies which conveniently mob up.
1 thing I am certain about is this: On average, 5 orbs = 5 attack times. 5 orbs incl. FA = 4.4 attack times. Since coma is the finisher, it's logical that doing comas 12% faster (on average) is a good thing. As you indicated, the total loss of FA is only -12% on 5 targets and -16% on 6. This means FA is definitely better on 1-4, almost the same on 5, and only slightly worse on 6. (this is only approximate)
- I wouldn't include single target SB in the net % change of FA, you won't use SB if there's a single target.
SB+FA+Coma > SB+Coma.
PS+FA+Panic > PS+Panic.
For WKs single target damage is extremely important because their mob range sucks, leaving them attacking single targets a lot of the time. Can't say if that's the same for Crusaders, since they can hunt Gobies which conveniently mob up.
1 thing I am certain about is this: On average, 5 orbs = 5 attack times. 5 orbs incl. FA = 4.4 attack times. Since coma is the finisher, it's logical that doing comas 12% faster (on average) is a good thing. As you indicated, the total loss of FA is only -12% on 5 targets and -16% on 6. This means FA is definitely better on 1-4, almost the same on 5, and only slightly worse on 6. (this is only approximate)
- I wouldn't include single target SB in the net % change of FA, you won't use SB if there's a single target.

