Edge of Fate Prep for Warlock Main (ONLY, actually... LOL.)???

I only play Warlock. If it matters, I currently have a Prismatic build with Solipsism (SoIL/Verity) that leans into Strand (Barrow Dyad and Pro Memoria) that I enjoy, but have had fun with solar and stasis builds in the past.

I have been gathering materials to reset Rahool and now learn that that won't be a thing in Edge of Fate. So... for a Warlock, should I go ahead and try to focus some Exotic armor with combos that won't be a thing in Eof... like Mobility / Intellect? Or, should I just save all of my Exotic Engrams, Ascendant Shards, etc. until EoF launches?

IF you think I should go ahead and focus Exotics and knowing I have ~12 Engrams to burn:

• Which Exotics will be best in EoF?
• What Ghost Mod should I use? (Mobility?)

I've been playing for ~1-year and absolutely love this game. I'm learning more and more, but all of the changes coming up make my head spin... so I greatly appreciate any guidance here. Thanks!