Excolion: The bow I mentioned is named Royal Bane. It gives 21 to hit and +%169 damage to undead (which equals to about 100+ damage to undead with a single hit, if you have 20 Ranged Combat and 80+ Dexterity.) . It also gives armor class and some resistance to frost. It is in the Royal Governor's house in East Glatzburg. His house is to the East. I think you are trying to get the wrong bow :) And by the way, mana drain is totally useless imho.
Nirth: Yes, that's the one. It has 15% mana drain for me as well. :P
Nice about the undead damage. Currently I've 65+ dexterity and 16 in Ranged Combat.
I left him in the forest.
This tacti is awesome but doesn't work with small areas where you can't run passed the guard. Anywhere else this is possible? I tried Governor and Royal Governor in Hillbrandt but too small areas.
Speaking of skills, I assume 20 is the limit? Is there any point increasing above 16/mastery or?
Hmm interesting. It has mana drain for you? In what difficulty do you play? It has the above stats in Hard Mode but no mana drain.
As you also said, this tactic is not possible in many places. It drove me mad in Act 3 (read my first two posts above) that it is simply impossible to open the chests without attacking that guard and an important NPC "Robert". Any info to achieve it if you can find is welcome.
20 is the upper limit, yes. As a thief, you can't invest to some skills after 15 (Spell schools and Melee Combat I think). The cap is 15 for them. As a paladin, the caps would be different of course. But 20 is the overall max.
Investing above 16 is needed after some time. For example, I could not open those Act 3 Golden chests with 16 Thieving. I had to have 20 to unlock them. The same goes for perception. Some traps can only be seen if you have 20 Perception only, or lesser with the Perception booster spells. Even some traps, (as I mentioned in my first posts) can only be detected with 20 Perception + 1-2 booster spells. I highly recommend you to have 20 Ranged combat, because not only it increases your damage and chance to hit, it also causes your bows to lose durability very slower (this is not written in the skill description). Royal Bane has 110 max durability. With 20 ranged combat, it hardly ever reaches 0 durability. Some other skills also benefit from the extra points you invest after 16. Magical boxes and the Skill Points you get from them are invaluable just because of this.