Terry Richardson‘s style in Pro work

Customer is asking me for direct flash look in Portraits. I absolutely love the challenge. For enough Power, my goal is to mount my battery powered Elinchrom One to my Camera, as close to the lens as possible. Current plan is a Small Rig Magic arm. The light itself is 1.5kg, mounted to a Nikon Z8. Shooting in Portrait mode.

Does anybody have experience with my situation, or have more stable/ ergonomic mounting ideas? Any opinions on building it on a bracket like Nisi Wizard?

Woule be happy about any help.