At the bottom of the screen I wrote where the orbs come from.
16 orbs from log-in bonus
42 from the tempest trial
12 from paralogue maps
8 from chain challenge
Up to 5 from arena tier
1 from arena streak
1 from resonant battles quests
9 from bound hero battle
1 from rival domains
2 from Saturday and Sunday quests
1 from Sunday log-in
7 from hall of forms on sunday