OML stated they were the X-Men's team of hunters, and Domino again calls them X-Men when talking to Omega Red.
Also, old disagreements were about business. He betrayed her & she got no money. That's perfect reason to not do business with him again. Lol
They WERE in the same boat, but after issue 11, the entire team had no reason to still be together. And Creed was still written trying to tear OML's throat out. Despite that being contradictory to Creed's inverted persona.
Far as canon, there's 5 different versions of it because nothing is consistent.
It's canon Creed & Mystique hated each other. Until it wasn't.
It was canon Creed loved his mother, but wasn't when Gilleon wrote he killed her.
It was canon Sabretooth was stronger than Logan. Until it wasn't.
Monet was black, until she wasn't. Lol
Point is, characters are all over the place. And some fans will overlook later retcons.
So, imo I still don't think Deathstrike should be on good terms with Creed. Just because someone wrote it as suck doesn't mean it makes sense, and isn't contradictory. And it leads to the question on why the Hell she would work with him when he still owes her money. lol
But I won't tell you what to go by in canon. So it's an agree to disagree. We're all stuck picking & choosing since characters are written numerous ways based on a writer's mood or fondness for said character.