Falling Icicle
Adventurer
OK I asked him your questions, and he almost immediately replied.
1) Q: You mentioned invocations are always based on abilities or traits. What does this mean?
A: some of them (not all) improve other abilities. One of mine boosted damage for eldritch blast.
2) Q: Since Warlocks regain spells after a short rest, how does multiclassing with mage work?
A: two separate pools of magic - the you'd have X wizard slots, Y warlock ones, get warlock ones back with short rest
Thanks!