If Watkins was playing well then I doubt this thread would have got off the ground. The fact is, he isn’t, and he needs to realize that if he isn’t, then someone else will get the chance to do better.
I would be prepared to start Archer with Ings and give him until at least half time to make his mark.
If it’s just not happening then bring Watkins on for the second half. If nothing else, we would see what Watkins is made of when put in that situation. Hopefully he would be doubly determined to do better than he has been doing. In any case I also think we need to see if Archer can link up with Ings more effectively anyway, it might just prove to be a better partnership.