1 Tenno appears in Destiny's Sol System, how well they do?

The post was inspired by a similar one from the past post.

The Tenno in question will have everything a Tenno would have. Orbiter, Warframe, Pets, Weapons, and etc. Maybe even a Railjack but I am unsure if any individual Tenno owns it.

How well would they do in the Destiny's Sol System? Would they still kill foes like Eliksni, Cabal, SIVA, Hive, Vex, and etc, to the same extend they do in Origin System?