dragon scale u can use
wolf tooth+wolf tooth (using junior,so u wont get lower rank item :D )
when u get dragon squama...make dragon scale from hot kilin :)

for clear devil spar...u can hunt from cow lvl 70-80 (forget wad lvl) to get CLEAR DEVIL SPAR... Red Cow :D
same with devil spar piece...
the drop rate is low too :(