I believe he had a spear in the mini comic. That would most likely be his weapon, and probably a different colored power sword. As for parts reuse…the bare feet could be used for a "200X-like" Stratos. Maybe the feet could be used for King Hsss as well? In addition to what you've mentioned, Oo-Larr would require a new hair sculpt too. His hair was longer than the standard He-Man we all know.