Noob demo - pvp build and gameplay?

I rolled a demo for Saga of Blood and I am man enough to admit that I am relatively awful. It’s not going that bad but I feel I have little coherence in my style of playing and I need some advice.

Thus far I’ve gone conflagration, only spamming Fires of Gehenna and hellfire stream, casting in Living Firestorm to augment dps and detonation when needed.

Is this the way to go or should I be going havoc?

I have been looking at old guides where Havoc is recommended but they are all obviously for level 80, and current Saga is level 50.

Furthermore, if I go Havoc, should I basically remove Gehenna from castbar and only cast Shockstrike?

Kind regards,
Noob demo Neferit