Give Leona a way to proc her passive
can. So why can't Leona? That would greatly help her small amount of players that like to take her other roles besides support. Because people who do have a useless passive if they take her top or jg and she can't proc it unless she has an ally near to do it with.
She already has enough CC, so nothing like Braum's passive of course. Maybe if Leona attacks a target with Sunlight, she deals half of the damage while her ally deals the other half or something.