Blasphemy and curse support gems

I have noticed that curse support gems like "Impending doom" or "Decaying hex" can not support a curse that is socketed into blasphemy.
It seems quite clear why that is the case, support gems only support the "main" gem, but i think in this case i find it rather unfortunate and it would add more fun and creativity to building a blasphemy setup if it was possible.

Maybe this is a thought-through decision. But making a chaos dot aura or have everything closeby explode would be really cool and i dont see how it would be broken. So please, make those interactions possible so we can support curses in blasphemy setups!

Decaying Hex is bugged anyway and doesn't do the damage it should. But yeah it's either bugged in the sense that it should work or its bugged in the sense that we shouldn't be able to slot it with blasphemy. I think Impending Doom is also bugged when a curse spreads from a killed mob but could be wrong.