now that we have the gunner update giving us so much more gear to craft (and ultimately heat), the radiant problem is much more apparent.
depending on your luck, you can get maybe a radiant every 4 minutes if you farm T3 arcade. FSC is faster, but ultimately gets boring.
taking the rate I just pulled out of thin air, it takes about 30 hours to heat one weapon. ONE.
thats not acceptable.
what we need is a better radiant drop rate or a broader radiant drop location.
right now it is wasteful to heat 5* armor and shields, while it is ill advised to "upgrade" your weapons.