He shares good equation with Krushna and probably with Govinda as well(Correct me if I’m wrong).
So why he ignores Aarti on WKW?
-IMO he avoids her due to the backlash he got during Season 7 because of Tanisha-Armaan. He might not be that close to Govinda-Krushan compare to Ajay-Kajol, but if he starts favouring Aarti their is a possibility he might face it again.
-Being biased towards non-related contestants is a different thing. He didn’t get the same backlash for siding with GG/Shilpa/Shukla/Shehnaaz the way he got for TanMan.
Probably that’s the reason he ignores her.