How to catch up new covenant specific conduit after swapping.

I want to swap from NF to Venthyr on my druid and I need to get the ravenous frenzy conduit up to 200+ ilvl.

I don't have tier 6 rep with the research guy in korthia so I can't buy those upgrade items yet.

What's the best approach to get it up ASAP? Do I just grind the shit out of Korthia for random drop of <insert name of the item that upgrades conduits up to 226ilvl> every day + do Adamant vaults in Torghast to get that one as well?

Also old world bosses can drop 200ilvl conduit, so maybe I can get lucky there? Anything else? Thanks for any advice.