F1.4 primes on FTZ, or F1.8 primes on your Z?

Just idle thoughts here.   I bought a Z9 this summer, and taking advantage of the 4th of July sales, I bought 7 z-mount lenses also, including 35, 50 and 85 F1.8's and the 105 macro.

I shot portraits this week, with backdrop and umbrella'd strobes.   Normally I like to use my 85mm primes for this purpose.  I ended up shooting a D850 with my 85F1.4g prime because I couldn't fire my strobes with the Z9.   And I was shooting F4 to F5.6 for depth of field.

But the experience made me wonder about something I've not yet tried:  Using my F-mount primes on the Z9 with FTZ2.

I like my F1.4 g-mount lenses.  (Even the 50F1.4g, which does have some bad IQ issues wide open).   But I also like my z-mount primes, even though they are only F1.8.    Maybe when the F1.2 primes are out I'll get those, but they look awfully big, heavy and expensive to get that faster aperture.

What are your thoughts on which lenses to use if we're shooting 'around wide open'?   Would you prefer using a Sigma 35F1.4ART on the FTZ to shoot at F1.4 or F1.8, or just use the 35F1.8z?  The 50f1.4g (at any aperture) over the F1.8 z?   The 85F1.4g over the F1.8z?

I've mentioned before that once you get enough lenses, all of them become specialty lenses.  Are there any shooting scenarios that definitely favor the F1.4's over the F1.8's and vice-versa?

I'm trying to understand the strengths and weaknesses of these F-mount lenses on the Z9.   I've been happy with the z-mount primes, but it seems a waste not to use the F1.4 lenses I have.