Agree you can try to let it dry out some. Then try some fish. By that I mean fish emulsion, and I like Alaska brand (box stores), doesn't stink. That will get some N back in for green. Pinch off the worst yellow leaves and let plant work on new growth. Once they start looking pretty again, cut back on N or you'll have all leaves and no flower/fruit. Another one I like is Johns Recipe (Lady Bug brand) found in some garden centers. It has a ratio of 3 -1.5 -2. You can also work in some Black Kow. This is the bagged poo, rated .5 - .5 - .5 (I get it at Lowes). It has sand in it, so works in easy. I work that in around the top with the hand cultivator.
As for container mixes, we all have our pet formulas. Mine is about 1/2 bagged top (I check for ones with some sand, not all clumpy clay), some cotton burr and black kow. When doing the pot add a few handfuls of 'enriched dirt' which is my compost pile of dumped pots, kitchen scraps and a mess of worms.