All other types of MP spending (Elven Boots) or non-MP movement ("Move up to your speed") are prohibited by being immobilized.

Should that say "are not prohibited"?

All other types of MP spending (Elven Boots) or non-MP movement ("Move up to your speed") are prohibited by being immobilized.

Should that say "are not prohibited"?

1) In the RTL app, if a monster is required to engage/spot the closest hero with the lowest of a certain skill value, and a familiar treated as a hero figure (like the reanimate) is nearby, does it count as having 0 for the certain value..? Or not counted into the equation at all (since it does not have any values to begin with)

2) In the RTL app, I'm a little confused when it come to ranged units. If it says "attack the closest hero" for example, and that target is grossly far away (let's say... 10 spaces but within los, or even if the closest hero is within the max calculated distance that the monster can possibly get from a best scenario attack roll), will the monster attack..? Or resort to cycling through to make another spot/engage action to get in closer

3) For some quests you remove all map tiles and figures etc. to place a new map. Do familiars follow and get placed aswell?

1) yes. RTL rules, page 13 appendix 2

2) it select closest hero, who is in Los.

So yes, if first action instruct monster to attack nearest hero and he has Los to that hero, he should attack

Familiars would not follow with you. They are not placed like heroes (unless the specific familiar is auto-placed at the start of an encounter).

I should have specified it's for RTL when one quest can be disassembled multiple times but I suppose it's no difference there

1) Can I, as a hexer, use viral hex:
"Exhaust this card during your turn to take a number of hex tokens equal to the number to hexed monsters within 3 spaces of you. You may place each hex token on a monster of your choise within 3 spaces of you"
the very moment after I have used Enfeebling hex:
"Surge: Hex 1 monster within 3 spaces of your target"

before damage is dealt?

This is (to most) a little "abusive" timing trick to try and get the most out of your Viral hex skill. Let's say you have three monsters within 3 spaces of you. One of them is hexed, you declare an attack against one of the other two un-hexed monsters. You roll a surge and spend it to hex the monster, right afterwards (before damage is dealt) and as fast as the hex is put on your target you exhaust Viral Hex to put 2 hex tokens on the third monster resulting in all 3 monsters being hexed. Afterwards, when the damage of your attack sink through the initial target dies.

2) The target of Fel Command:

"Exhaust this card when the overlord chooses a hexed monster to activate. Discard 1 hex token from that monster to immediately perform an attack with it. You make all choises during the attack. After the attack is resolved, the monster activates as normal."

cannot attack itself... right? (like Dark Charm) I guess it follow any normal rules of an attack since it doesn't specifically tell you to be able to attack yourself

1)I doubt it. That would be interrupting an attack action before it's completed and they have been rather strict with what things can interrupt a non-move action. While Enfeebling Hex is designed to be used during your attack I don't think Viral Hex is. You'd probably have to wait until after the attack is resolved to use Viral Hex.

2)I'm not aware of any ruling that prevents a figure attacking itself, though I can't think of any situation but the one you're describing where you would want to.

1)protopersona is right. "During your turn" means "perform action phase, not interrupting any non-move action."

2)the default rule against attacking yourself is that you must attack a space containing an enemy figure. Fel Command monsters can attack other monsters, but cannot attack themselves:

https://community.fantasyflightgames.com/topic/86124-lor-hexer-class-questions/

Regarding Fel Command: Is the attack you force the monster to do... 1 of its 2 actions for his activation? Meaning, after Fel Command the monster only has 1 action left, and it cannot be an attack?

No. The attack is not part of that monster's activation. Fel command occurs before the monster's activation actually begins (see end of the card: "after resolving attack, monster activates as normal." 'As normal' meaning 2 actions.)

2)the default rule against attacking yourself is that you must attack a space containing an enemy figure. Fel Command monsters can attack other monsters, but cannot attack themselves:

https://community.fantasyflightgames.com/topic/86124-lor-hexer-class-questions/

This answer should probably be added to the "FFG Sez" thread and the Hexer section of the wiki on BGG, I couldn't find it easily. Thanks for that though, seems pretty definite.

Seems as you're on a roll Zaltyre...

Can a hero gain or spend movement points before or drawing a trigger which allows you to 'move up to X spaces'

Specific Example - the Knight (move 4) defeats a goblin and wants to use Advance to engage another goblin which is 6 spaces. away. Can they suffer a stamina, move 1 space then activate advance to move adjacent and then attack?

I feel no but thanks to the lack of the word 'immediately' on the Advamce skill and the protracted 'discussion' I let it slide and them have it and we agreed to defer to your wisdom for future sessions.

Thanks

No. Advance is still part of the attack ation preceding it (occurs after the monster is defeated, not after the attack resolves). As such, there is no valid windoe in which to gain or spend additional MP.