Splinter Storm have high Range and high Duration... which means long Damage Reduction and... low Damage? Yeah, until you use Mass Vitrify.

Use Mass Vitrify, go outside the ring, use Splinter Storm on yourself, destroy Mass Vitrify with Shattered Lash... and you are now MVP in your team.

How?
If Mass Vitrify's barrier is destroyed by Shattered Lash and Splinter Storm is within the explosion radius on the outside of the barrier, 50% of the glass fragments' damage is permanently added to Splinter Storm's damage per second until its duration expires.
Absorbed damage is calculated after additional damage from mods.
Absorbed damage can stack from repeated Mass Vitrify explosions inside Splinter Storm's radius.
Casting Mass Vitrify will also refresh the duration of Splinter Storm on [Gara], as well as any affected allies that contact the molten glass during its expansion.

Understandable?
You will gain so much damage, that you don't need more Strength. For example, after 5 waves on Hydron you can absorb over 100k and give it back to your enemies. With x12 Combo... figure it out :)

What you need is Duration to [Extend] Splinter Storm timer, and Range to [Extend] Splinter Storm radius for that huge damage. You will be... untouchable, powerful, highly helpful and all you have to do is... use your skills.

On top of that, Splinter Storm absorbed damage is affected by equipped melee mods including Base damage, elemental damage, and physical damage mods.

Shattered Lash is also affected by equipped melee mods including Base damage, elemental damage, and physical damage mods... and Rivens that add any of the aforementioned stats.