I'm not playing PTR, but my possibly stupid current season build is Archon based.
The trick? It's using Firebird rather than Vyr, and relying on the Firebird 6pc 600% bug to get the damage up to ridiculous levels (20 stack Chantodo damage for 7000% mixed with the 600% is just dirty - crit waves are over ten billion damage, and my gear's rubbish). Partly because I still think Elective Mode skill selection is a cheat so I can't use this build (Disintegrate, Vyr and Swami are not friends - Archon Swami makes your attack speed so fast that Disintegrate will burn through all your MP in half a second!), but there's a few things here I want to try, particularly for jewellery options - I'm using F&R with Ouroboros because that's the best I've found, but the meta seems to be built around the Endless Walk these days so maybe that with Zodiac, or some such (I've got Unity in the cube for survivability, but Zodiac is a clear cube ring rather than something to actually wear).
Furnace is mostly obvious, but I like In-Geom for the cooldown reduction (it can even repeatedly zero the cooldown of the Archon 1-spam).