What is expected: Taking Blazing Flare and Searing Dart in the Runebolt tree should convert Frostbite/Shock chance from all sources to Ignite chance.
What actually happens: Rubebolt still applies Frostbite and Shock.
How to reproduce: Take Blazing Flare and Searing Dart for Lightning → Fire and Cold → Fire conversions. Take Orderly Circuit for extra Ignite/Shock/Frostbite chance. Spam Runebolt at dummy to see Frostbite and Shock being applied.
I suspect the damage conversions don’t work for Cold/Fire → Lightning and Lightning/Fire → Cold as well.