I’m dividing what is essentially the same idea into two entries—this week and next.
The words/phrases you should never say again (ever) are:
Him and I, or
Her and I.
I’ll keep this simple! If some folks are DOING something—walking, going, planning, giving—anything that involves them doing the action, you must say (at the risk of sounding dumb)…
He and I, or
She and I.
(Sad confession: If I hear “Her and I went to the mall” or any close relative of that sentence one more time, I may just lose it.)
So just keep saying “He and I” and “She and I” until you just can’t begin a sentence or describe those doing an action with any other phrase.