a) I did figure some stuff out for RSG, but that's in the form of an excel table
I could give you the names, though:
Makuta that so far die after/during the Great Cataclysm are:
Antroz, Bitil, Chasnon, Chirox, Chisk, Dredzek, Erevor, Falkin, Gantil, Hesbrix, Icarax, Jormuntrax, Jsasax, Kaihodian, Karangu, Kerona, Krika, Lomois, Moldavanka, Mutran, Spiriah, Tak, Teridax, Tridax, Troodax, Vamprah, Xirok, Zhun, Zurta, Ahkaxx, Akima, Gorast, Kindrix, Scarla, Thorkahn
Everyone else currently on the accepted list is dead by then
b) No.Currently there are 7 Makuta who died before the Convocation.
See first post with the map.
Rules and list in post 1
All Makuta are currently assigned