Genuinely I think SpiderAxl has the potential to be a fun ship. Like you've got this jaded mercenary paired with this hyperactive assassin thats a hunter because he was so driven by his morality.
At first Spider doesn't have the greatest impression of Axl, mostly seeing him as most people do: some weird, overexcited Hunter fanboy. Axl's enthusiastic, but not super thrilled with having to work with an uncaring mercenary that openly admits that he'd have their heads if someone paid enough.
But then they work together! Spider finds that Axl isn't so naive and is just as much of a smartass as Spider himself is! Axl sees that Spider treats him as more than a loose cannon or a rookie. They even bond over their past mercenary work.
Axl reinvigorates Spiders justice, and Spider reasserts Axls sense of self and competence.
Then the angst...