Ok, but Lucian as NPC doesn't really matter here. Every extremist is a madman and takes action that are not based on logic but his emotions and fears. That's why i wrote "all the stuff involving him doesn't make sense just because he's crazy". Maybe i wrote it in misleading way but i meant that i do not expect anything involving his evil plan to be logical. It's interesting that you can see him as non-villain (i really wonder how can you justify his clearly evil actions, like murdering innocents, so feel free to tell me about it) but it's not really what i ask.

What i mean is that he was divine for quite some time and had that whole pool of source at his disposal (Etheran) and yet he died almost as easily as some random gang member (Kraken was just a summon and required more effort to get killed).

What i mean is that source is portrayed as something very important and useful in narration but in actual gameplay it hardly matters and if i was wearing that source-blocking jewelry for the whole game (excluding Bless which is needed for main quest) i wouldn't really feel that i'm missing something, every source skill was replacable by other skills without much loss of firepower (max 20-50% once per fight, usually not in 1st turn). It's supposed to be the medium for souls, but consumed souls can be recreated apparently. You can use it to fix the veil but it just makes it a quest item not important part of the universe (e.g. Force in Star Wars is like an element, not physical item). From my experience it's unknown if it's limited or infinite (gods created mortals as harvesters of source so it seems that it can be produced, but it might be a tricky way of saying that it was "spilled" when tearing veil and gods just wanted to pick it up), it's supposed to be limited and yet everyone has some tanks, bottles, medallions or even toys full of it. I've finished 2 games and still don't understand the concept of what it really is and it bugs me.

Maybe scriptwriters just didn't care and "it is what it is, it's needed for plot, move along" is the correct answer.
Or maybe it's like Anathema which is praised by Tarquin but pretty much useless until you are that one specific guy who can really use it efficiently (my crit chances were too low to even consider it).
Or i can imagine it's just another layer of gods' show- they made up stories about power of source as some sort of propaganda, but this one seems like a bit of a stretch.