Blc. Waianae Leopard 'Ching Hua' Secret?

[D&S Mabel]

Help needed here with Blc. Waianae Leopard 'Ching Hua'.

I am having very little luck with this plant. I have had three of them - 1 died and I chalked it up to too small a plant (2-1/2" pot) and me not keeping a good eye on it. Of the two I have left (which I've had for 18mo. now), one is on its last legs. It started to send out a new growth but that has died back and the leaves are shriveled a bit. I don't see any good root growth and the plant just seems to be fading away. The second plant is ok, it has a new growth on it but, overall, it is small, looks a little rough around the edges and grows very slowly.

I have them in amongst my other cat. types, which do pretty well, and have them potted like cats. What am I doing wrong? Does this plant need special attention or is this just a test of my patience?