Using the old Magic Tinkering

Quote from SunIsGettingRealLow96589 >>

"Alchemist's Fire does not impose a doused state."

Doused STATE?  Ok. this is ridiculus. You realize the rules are just broken here and improvization is needed, right?  

A player says they want to swing across a chandilier. And the dm says "there is no chandilier defined in the equipment list of the dmg, so it does not have a defined "swing" action. So you cant do that"  

Are you discussing RAW or ad hoc adjudication? Pick one.

The Alchemist's Fire deals damage.

The doused creature takes extra damage.

A creature that enters or the square or ends the turn takes damage.

Oil behaves like a condition. If you are poisoned for 1 minute and you get poisoned again, you are still poisoned not poisoned 2.