Mayday beats Anya, then whoever the winner of Gwen vs Silk is (not sure there). Then Jessica Drew.
May's both really experienced, and has some unexpected powers that give her a nice edge. I think she has the strongest spider sense, but importantly, she also has the ability to make surfaces sticky, which can nullify the agility of the others at a bad time.
"IMO" I think that it will be a toss up between Mayday and Jessica Drew. The way I see it Mayday will beat Anya, and even though her experience is only implied, I'd give the win to Spider-Gwen as Silk has not as much experience. In a fight between Mayday and Spider-Gwen I'd lean towards Mayday, and that may be simply be bias on my part. Then it would be a split between May and Jessica.