Currently no one goes to the wilderness to farm lava dragons because, well it is quite useless. (Unless you're an Ironman ofcourse)
Lava scales are required for Extended and Super Extended antifire potions. At the time of writing this there are only 100 in Trade Post for 117k each minimum.
No one farms brutal black dragons either.
I have two suggestions for QoL:
Add Lava Scales To Rune dragon, Vorkath, and King Black Dragon drop table
OR
Add Lava Dragons to Ezone
Either one would help HCIM, EIM, UIM, and regular players get a hold of them for potions a lot easier and cheaper than they currently do.