For 2H I recommend
1. Critical Charge -> Critical Rush
2. Cleave -> Brawler (shield you)
3. Uppercut -> Wrecking Blow (extra damage for your next Wrecking Blow which I recommend for stronger mobs).
4. Reverse Slash -> Reverse Slice (if you prefer aoe) or Executioner (if your playing style means fast killing single mobs - that's my choice now on vet, but I started with aoe)
5. Momentum - opening skill before Critical Rush (to power up all skills). No idea yet what morph is better here, probably Rally to heal when effect ends, because Forward Momentum reducing cost which for opening skills which lasts 30 secs doesn't really matter and there is no snare at start.
Descriptions
Attributes all into stamina. Join a guild ans ask someone to make you a 5 pcs. Hunding's Rage medium armor set (6 traits), with 2 pcs. Night Mother's Gaze medium armor set (6 traits), both your weapons with precise traits to be also made in Night Mother's set. All jewellery with robust to increase max stamina and weapon damage enchantment (increase weapon damage xx for 5 secons from glyph of increase physical harm) or to Reduce stamina cost of abilities (Glyph of reduce feat cost).

For Bow:
1. Poison Arrow -> Venom Arrow (to interrupt casters - very useful against sorcerers)
2. Volley -> Arrow Barrage (to increase radius)
3. Scatter Shot -> Magnum Shot (to increase distanse from mobs for your next attack, especially in critical sitations like soloing dolmens)
4. Snipe -> Focused Aim (most powerful when followed by another snipe - opening 2 shots should kill most single mobs, with high crit and Shadow stone (incr. crit damage) also one shot kills enemy sorcerer)
5. (...) to mark enemy or buff your damage

I don't recommend Arrow Spray since it costs too much stamina and effect isn't as expected. At least for me this ability sucks.

I can't recommend any opening skills for DK, but I assume you should search in your DK skills tree for something that either buff your damage for x seconds to make your crit rush more powerful (Momentum is the last skill from 2H so try something else instead first), or mark enemy to reduce enemy armor and spell resistance by x for x seconds.
Mark Target -> Reaper's Mark from Nightblade is perfect for Bow users, before sending first Snipe, but for DK - just find a similar ability if possible.