I would keep RCS in with my apisto(s) (sadly, my female died, I plan on adding another). They seem docile enough, however, like most fish, they will eat the young, but not enough to bring the population down. I think you would be fine to add RCS, amanos, and larger shrimp. I would not do any CRS or tigers just because of their price range and how they are small. If you can get some RCS for a low price or you have them in another tank, I would add a few and see what happens.
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