Sailor, as always, your answer is spot on! ;)
It's so detailed that I'm almost afraid to read it all at once...
Added 3 minutes ago
You still need to spend 2 skill points somewhere. Master of Siege 1 and 2 are good skills, in my opinion. And considering Supric's notes, the points will be spent wisely...
No, I disagree. Even with 30 skill points, it's not enough for everything you want to invest in, and spending them on Master of Siege is pointless, but that's just my opinion.