Who has the most Strife Specubi? Also do you think it's going to be stated or implied John gives Rose her Needlekind back? Maybe she doesn't need it?

John, Dirk and Equius all have three.

Equius has Fistkind, Bowkind, and Halfbowkind.

Dirk has Bladekind, Puppetkind, and Fncysntakind

John has Hammerkind, Bunnykind, and Needlekind. 

John didn’t give Rose her Needlekind as she’s seen using it before she interacts with him in the Post-retconned timeline.  So either she made a new one or gained enough tiers so that she doesn’t need a specibus to use a weapon anymore.