Use [Terminal Velocity], proj speed on grenade launches reduces the arch in addition to travel time meaning you can shoot things farther away while needing to compensate less

Do not use [Hunter Munitions] on [Tonkor] despite what people may tell you, hunter munitions is most affective on high fire rate weapons because you need several bleed procs for it to be effective not just 1-2, [Hunter Munitions] is a very bad choice on grenade launchers especially ones with only 1 round in the magazine and slow reloads

For rivens Crit chance is a must to be slottable and replace [Point Strike] if you plan to use one, for secondary stats Crit Dmg + Base Dmg are groll
(reload speed or any raw dmg buffing attribute is viable)