Rested is a status in Divinity: Original Sin 2.
Character's primary attributes increased. Protects from Muted, Blind, Crippled, Knocked Down.
Some theory crafting here... Just use First Aid (for rested stat buffs and CC immunity) and Peace of Mind (for additional CC immunity and stat buffs). Focus in Necro for self heals while doing some high piercing damage, perhaps? Would you essentially not need to worry about armor and being CC'd, but just ensure your health pool is high and that you are always doing damage?