Kribs are fairly easy, Apistos are too if you have tank-raised one. Rams, so I understand it (and have experienced) are easy to spawn and get eggs.. but really hard to hatch eggs and raise fry.
Theres many different kinds of Apistos. Which Ram? Bolivian/German Blue.
Yet, most (If not all) breed quite easily with acidic soft water. The usualy 78-80 temps etc.