You need shallow cover to enable your forage to survive long enough to reach spawning size. Removing a lot of stunted lmb cats and crappie is also important but without shallow cover you're doomed to repeat scenario. Think dense cover in 1-3' water ESP near ur bg spawning sites. Up north cedar trees serve this purpose well are free and plentiful. 3 trees tied together and weighted down with cinder block is the ticket. I advise against stocking fhm or any forage species that won't offer at least a chance is establishing a permanent population. I don't know enough about tfin shad to comment but it sounds as if ur lake is large enough to support them.

If you create shallow cover your bg populations will respond fast and overall forage base will improve dramatically making healthier predators. This is the cheapest and simplest way to address the issue IMO

Many men go fishing all of their lives without knowing that it is not fish they are after. ~ Henry David Thoreau

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