Agreed on the remark on barter, charisma, pickpocket, and lockpicking being useless skills in this game. Telekinesis is not useless, but can easily be taken care of with items or potions. Sneaking 5 for an archer build, however, is brutal. With a home-made bow (with Crafting 5), Guerilla and Quickdraw the damage per AP exceeds not only rogues but even melee characters, given that For 4 AP you can go into sneak mode and shoot. Not to mention that as long as you finish your turn in sneak mode you won't be needing any defensive skills because you simply won't get hit.
The advantage to be able to control the battle field without having to move (much) is priceless. Plus you still have Tactical Retreat to get in a position where melee characters can't reach you easily.
Ricochet, Barrage, Arrow Spray and the like should only be used in those rare occasions when the battle field is too crowded to sneak between shots, because their damage per AP output is worse than that of a normal guerilla shot. The most useful ranger skill to me is Rapture, by a large margin. And of course all those special arrows.
