With the LoN buff gone, our chances at the 45 GR solo vanished. There are 2 of us.
You’ve done two conquests already, but not The Thrill or Avarice? (Which two did you do??)
You can still do The Thrill if you have a LoN build. Assuming you’ve salvaged all the LoN rings you’ve dropped, just gamble bloodshards for rings, and upgrade rare rings, to get Litany of the Undaunted and The Wailing Host. Ideally you want ancient ones, but so long as you have ancient gear for all other pieces, you should be able to clear GR45 easily even if you only have plain legendary rings.
You don’t even need a proper build to clear GR45 - you should be able to clear it just with whatever best ancient pieces of gear that you have!
In terms of Avarice, quickest way is a levelled Boon of Hoarder (Avarice Band and as much gold find % as possible will help too), and do either Not the Cow Level or Ruins of Corvus (run through without killing anything, to draw out the critters, and then backtrack to kill everything). Just make sure you have a build with good mobility and attack speed, so you can chain kills quickly!
I got Avarice accidentally (as in I wasn’t even trying to get it!) on Not the Cow Level.
If you really need help, try the Diablo 3 (Switch) channel on Discord. There is a link to it on r/DiabloSwitch on reddit.