I haven't played SR in a long time but i have otpd rengar and still love to play him from time to time.
I sae this video by s kha'zix main on youtube who swears by hob kha, and after the recent buffs on the item it seemed busted when i watched the gameplay.
I had never tried this rune before for some reason, and i have to say it feels pretty good to have, especially since the onhit damage doesn't get consumed on autoattack resets. In the early game it feels very good to have, as the attack speed and the extra damage gives you more burst than electrocute, and ehile the true damage isn't crazy high by itself, having that much attackspeed on 3 autos added on the empowered q seems pretty strong. The early game dueling power is amazing imo.
Bad thing is having to take domination tree which is like the most crippled rune tree of all