The first objective can be achieved by fixing a threshold on the variable importance, while whilst the second one requires a combination of variable ranking and a stepwise introduction of variables on a prediction model building. There's the punctuation; though I don't understand how you are achieving your second objective. Are you simply trying to describe what happens in Stepwise Regression by Forward Selection; or somehow, is this some ad hoc running of Single Regressions, followed by multiple Multiple Regressions somehow?
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.