hi
my master told me nearly nothing about the campaign. i know that there will be many undead enemies, and we will start in diamond lake, a village like town, and come later to 2 bigger towns, one of them called free city.
i will start with lvl1 Ranger (type dragon, natural attacks), and progress with 2 substitution levels at lvl2 and 3 or 4 (i will have to look how i need the HP from another class level).
Code:
+0lvl - Type: Dragon, Natural Attacks
+1lvl - AC +2, Lowlight Vision, Immun to Cold, +2 Str, +2 Int, +2 Cha
+2lvl - AC +2 (resulting in +4), Immun to Sleep/Paralysis, Darkvision, Breath Weapon, +2 Str, +2 Con
I already thought about the possibility presented in the UA, but i didnt read it till now, i just know that its there.
the weapon problem is maybe present, but i´m sure we will find a way to deal with it. after all we play as friends, and we have a mage in our setup, who will surely get some creation feats. we grant additional feats at every 5 levels (additional 4 feats), as we are not the heavy power players and we wanted to grant simply a broader feat range for our characters. I can build my own masterwork bow with my strength, so i will cover the lack of a magical bow for the first time.
Does the mount in this combination work like the paladin's Poke-Mount? This is a real important question to run by your DM
I dont know what you talk about a "Paladin Poke-Mount" (i´m german ^^).
the levels of paladin stack with outrider. the levels of ranger stack with outrider. the feat "devoted tracker" allows me to give the boni of animal companion from the ranger levels to my paladin mount.
so my mount gets +HD from Paladin, and +HD from ranger, and both advance with the outrider, what will be pretty cool (well, maybe ^^)
that would give me a hell of a pet, but i plan just to sit on my dragon, ride on it while the rest of my group walks though the dungeons
as the medium mount needs the same space as a medium character, that should not be a problem. after i have my dragon, we will just do that. i shoot some arrows in the room, and every few rounds we will both do our breath

my dragon can only the cold breath (will not do damage to every undead), but with my adaptive breath, i will get my breath to do fire damage, which will compensate for that). The +HD from paladin, ranger and outrider will make my dragon a good and tough mount.