Any suggestions on what weapon Adriana should take? I'm thinking either Marksman rifle or Shotgun, but is there any other suggestions?
Generally, you want Scouts to carry shotguns or SMGs in the early game. Shotguns are pretty much a guaranteed kill on any early-game enemy you can get up next to, and have incredible aim bonuses at close range. You have me for cover destruction and support grenades, too, so I could turn a bad situation around enough for you to get a perfect flank. You'd be pretty much stuck with Tac Armor and Ceramic Plating that way, 'cause Scouts tend to be high-risk high-reward (though not nearly as much as Assaults). The Scout's intrinsic mobility bonuses should make up for carrying the extra weight somewhat.
At least, that's what I usually pick for my Scouts in Long War. Marksman Rifle is also a good pick, since it does 1 more damage than the Assault Rifle, has more ammo, and can crit better. Also, since this is Beta 15 rules (as evidenced by Drum Magazines being an item), the aim penalty for firing after moving no longer applies to Marksman Rifles.
EDIT: Oh wait, apparently I was wrong. After reading the files, Marksman Rifles
do get -10 aim on shots after moving. However, they get Squadsight and +2 range? Interesting... Normally, you have to get a Marksman Scope to give Scouts Squadsight. Until then, only Snipers could make full use of the DMR's range.
EDIT: Wait, wtf? They changed that too? I'm just reading through the Long War wiki and it looks like Marksman Rifles... they actually don't need Squadsight to reach that 5 extra tiles of range. Wow. Interesting... that kinda makes it pointless to pick up DMR's for my Snipers in that case, unless I really needed that Snap Shot.
EDIT: Also, Solymr, I'll just keep my current stat progression. Thanks for checking.