When is SABERTOOTH carry a viable strategy?

In this mechabellum gameplay video RAT is playing multiple games where he is using Sabertooths. Or saberteeth. Which one is it? Music by Karl Casey ‪@WhiteBatAudio‬ RAT SHOP: https://shop.mechamonarch.com/ 00:00 Sabertooth game 1 19:21 Sabertooth game 2 38:50 Sabertooth game 3