A couple of questions - Need help please

[lasvegas]

Hello all. I play the game in normal difficulty as lvl 42 mage. I have some quests left in my journal and i can't solve some of them. I have cleaned almost all quests in the game and did all the battles in all islands. Now, the gate to demonis is open near the greenwort castle. But i don't want to move forward before i complete these quests. I am stuck. These questions remain:

- I have 2 quests about riftland but i haven't found the map for it yet. Or do i access there from demonis? I attached an image of my map so you can see which islands i opened.

- I am stuck at the quest "find the most powerful wizard in Arlania". Where to find him? I did the quest about magic tower and fought with the wizard standing at the gate of the tower but later i can't access to magic tower any more.

- "Pirate Treasure" quest at eastern freedom island, i am stuck cause it asks me to find 3 chests in a cave but i only found 2 and can't find another. I already checked every inch of the cave but there is no more chests there. Where to find 1 more?

- Arlania pub owner asks me to attract customers for him. I found 2 soldiers already. I can't find anyone else. What to do?

- Quest for "Mad Mullet". Where to find it?

Thanks already for your input and help.