There is a "backdoor" on weapon prophiciencies. When you transport your game from BG1 to BG2, you'll have all your points unspent because of the big changes between the two games (like two weapon style, single weapon style etc.). Similar thing to the racial enemy.
S'seldog has currently (after CON Tome) these stats: 18(48)/18/19/11/18/9. Sadly mind-altering spells are overpowered (that's why they got a hugh nerf for BG2).
About fullplate-mail: in the game it equalls with the Ankegh plate in AC, only it is nonmagical. But I almost never wear of Protection jewelry. Anyway, my favourite armor from BG1 is the Plate Mail +3.
I've reached the Cloakwood mines, where against the assassination attempt I required the use of a Potion of Heroism.
Interrestingly on the second level of this mine, at the stairs to the third level, the large group's mage shot a lightning what killed basically everyone in that room
On the final level I removed my armor, hided amongst the shadows, and shoot some arrows from the sidepassage to start the battle with the mage, and avoid the Battle Horrors. In addition I used up the Potion of Stone Form I had to avoid spells like Hold Person. And that's where I am now, being level 7.