Found your beast slann. http://images.dakkadakka.com/gallery/2011/1/3/169150_md-Mage Priest, Slann, Slaan Mage-Priest.jpg
Oh helllllllllllll yeah! Awesome idea. That is a real blast from the past. RAFM's old "Reptiliad War Turtle" from the early 80's! I used to have that (probably still do, deep in the bowels of my parent's basement). I used it in Grenadier Games' old wargames rules set, back when it made total sense to have skeletons, lizards, and orcs all fighting on the same side! It's on sale at FRP games for like $10, and Reaper does a similar one for their Reptus line. WAY COOL! Good find, N810. And my hat goes off to the sculptor!
I know you said you'd already got a lore of life slann, but this image from another blog/thread is kind of inspiring for a life palanquin:
That's pretty damn awesome, too. Could have a sprawling, mystical tree trunk with leaves holding him up. Could have branches/roots coiling around bad guys and tearing them apart, too!
The Incinerate picture you posted reminds me of this daemon army: Rest of the pics are here: http://battlereporter.blogspot.com/2008/12/best-warhammer-fantasy-army-ever-seen.html It's lit up with LEDs and fiber optics. DF2K this guy says it took him a year of planning and converting, but one Palanquin shouldn't take that long