Conjuration Points is correct as above. Also note that a lonely Astrolith Bearer generate D3 points even if your Slann general dies. The summoning point is measured from either the Slann general or the Astrolith Bearer, so if your Slann general dies and you still have your Astrolith Bearer you can still summon using your remaining points.
I agree with all four points above. I started using them more and more on my 40k orks and I just love them. Especially the browns. Any slight patchyness on those models is just a feature really.
Looking at the EU site (Finnish version) Stegadon, Bastiladon, and the Saurus Warriors are the only plastic kits that are temporarily out of stock. Of those only the Stegadon was repacked previously, iirc. The rest of the out of stock items are finecast. I doubt those are getting a repacking, and I'm willing to believe that their stock was low before and this is a sign that people are buying units before the BT arrives.