@ GiantOctopodes: I see it the same way as you. I try to prolong long rest time as much as possible by using cantrips and such. I did not use potions (except healing), scrolls, Arcane Acuity or Reverberation (because I didn't understand their potential ...), Haste, Shove or a lot of stealth in my first Tactician playthrough, maybe it was not too easy and not too hard for these reasons (I abused Wet, I have to confess).

@ Revmir_Nav: You can long rest before the final battle with Ketheric in the hive? How so? I could not, in my Honour mode run (Patch 5), or at least I was too dumb for it. Difficulty aside, I am of the firm opinion that you should be able to enter boss fights fully loaded up and rested, otherwise it's unfair. I was a bit annoyed that I had to face Ketheric a little bit depleted.