My 5e PC is a Half-Elf Rogue 1/Cleric of Knowledge 1/Warlock 8 — 4 sets of Expertise by 2nd level, tons of skills trained, lots of useful at-will options from invocations, access to Guidance. I cast Invisibility on the whole 3 person party, Fly, etc...
For reasons, I'm not a Book GOO Warlock...