Like Lupin said, compatibility isnt an issue between the botia & Pictus. If you want them, you can still get them. The JD shouldn't be an issue either unless he gets a mate & breeds. Lupin, let me know if I'm wrong on this...
I haven't seen any problems with loaches and pimelodus pictus. Also, in my experience, Botia Kubotai are very active as individuals. I have always had one or two specimens with no problems.
There shouldn't be any problems with the pictus, not sure about the JD cause I don't know much about cichlids at all. I started with one kubotai and he was ridiculously shy until I purchased two more.. I'd go with Jake on the 3+ figure, they are pretty social.