I usually play Threatening, and I'd almost consider my Hunter to be my most reliable, best character. If there were a DAMP competition for money, he'd be the one I'd use. He doesn't go down and he usually gets the most kills every time.
But all that changed when I went into Perilous Ferelden Castle.
I'm getting wrecked so badly no matter how careful and defensively I play. Talk about getting humbled.
I am using:
- Evasion Leap upgraded (I need something to help me get out of troubling situations)
- Toxic Cloud upgraded (good CC damage)
- Spike Trap upgraded (for protection and to help teammates get rid of pesky enemies)
- Stealth upgraded
Accessories:
- Enhanced and regular Life Drain rings
- Superb Healing Belt for 20% healing bonus (or Superb Belt of Health for extra 200 health).......didn't make a difference. Still died no matter which one I was wearing.
- Cooldown necklace or Stamina necklace (again, didn't notice much of a difference. Died either way)
- Bow with 1% heal on hit, around 180 dmg I think. I also have Longbow of Griffon that fires three shots, but didn't notice any advantage on Perilous.
In Threatening, that is the exact same build except that I use Fallback Plan instead of Evasion Leap. That build makes me unkillable and top scorer on Threatening, but I'm almost worthless on Perilous. I lose health so fast, even if I'm hiding behind walls or doing evasion leaps like crazy.
How do you Hunters and Archers out there play it without going down a lot and drinking both potions on 2/5?
I want to hold out hope that archers have a chance on Perilous Castle levels, but I'm losing hope after getting owned just on 2/5 or 3/5 alone.
(and to illustrate the stark contrast, my Pala character on Perilous Castle has no problem and almost never goes down, thanks to generous Guard building).
Since you have a heal on hit bow (good move) you are badly missing leaping shot. If you use leaping shot and use it wisely, it will act as a mini healing potion AND an evade move. Strafe often Left to Right/Right to Left and even constant Left Right-Left Right.
Keep it to a distance and monitor the aggro on you especially from enemy Archers, never a bad move to head to cover if too exposed/engaged by multiple Archers.
The dragon will occasionally strike you, so these heals are extremely useful.
You need to be more reliant on the radar, the minute you see Area 1 (bridge) the spawns are flipping, you have to be ready for the flankers.
Area 2 (base of ladder/stairs) region, be extremely mindful of the odd few enemies that will run down the stairs. You should pull back toward the start area, let them head in toward the warriors and then resume battle from an appropriate distance.
Your bow will see you recovering from most Dragon strikes, particularly with leaping shot giving you around 10-12% health.
If you are about to be meleed, Leaping shot, turn run, spam arrows rinse-repeat, run frequently, never be afraid to look foolish. YOU AREN'T!!
The Archer will often draw incredible aggro based on the sheer DPS that can be inflicted, so be ready for when mama comes calling for you 
Area 3 be mindful of Assassins if not playing against Demons. Don't bite off more than you can chew, keep it to a distance and use explosive shots on groups for good heals and huge DPS. Never forget that a jump off the edge of the Castle structure can evade an Assassin, but more often than not that Assassin will be stealthily making a beeline to the start point to shank you down
(Many squishy memories)
Area 4 again the switches of spawn can be important to monitor, shooting at the top of the stairs and strafing to the edges of the doorway and back can help. Be progressive and try and always flank your group.
At the Dragon fight, the whirling wing thing can be critical, the leaping shot will save AND heal you. Play ranged against the Dragonlings and keep a 3rd eye on the Dragon's flight path for those big balls of (insert element)
You sound like a good Archer, don't be put-off by Perilous it's a cake-walk once you learn the enemy spawn patterns/attack patterns.
FYI my build on Archer is Caltrops/Leaping Shot/Explosive Shot/Long Shot
I add Leaping Shot first along with an upgraded Long Shot.
Next I go down the tree and fill the team-based buffs - I can now spam my abilities like nuts.
I run Superb health belt, 2 HOK rings, Superb Cooldown/Constitution depending on the group
Line up enhanced Long Shot correctly and you'll grin in a way that no other action in DrAge can make you grin