It's odd.
Another linesman or another day, Ings has won us the 3 points and we're all gushing about a wonderful touch and ruthless finish, another match winner in the squad.
Instead he should be sold.
I'd suggest that yes there is a place in the squad for a poacher who likes to press, can score when others are misfiring, is useful off the bench etc; should he be our second choice to the front 3 however? No, he isn't a natural fit and is a step down in skill. I think Sturridge and Origi are off but both Solanke and Ings will remain with another attacking player coming in nearer or of equal quality to Mane/Firmino (as Coutinho was).
Danny does need to remain fit and impress throughout pre season though you'd imagine.