For your Heroic feats, it’s pretty straightforward. Focus on Encounter damage, survivability, and stamina gain. Do not put any points into Battlewise (reduced threat), Scoundrel Training (At-Will damage), or Extra Action (AP gain) as those stats they give astral diamonds are completely worthless on Hunter Rangers. Apart from that, you can move around a few points from what I’ve done to fit your play style.

For your Paragon feats, I recommend using my allocated points exactly. The key to the Trapper build is in the two feats Forestbond and Swiftness Of The Fox. This is what allows the Hunter Ranger to have virtually no cooldowns on their Encounter powers when used appropriately in the rotation that I described above. Another vital part of the build is Serpent’s Bite which I detailed when going over the Class Features. Serpent’s Bite and Aspect of the Serpent work together to massively increase your neverwinter astral diamonds store damage and Crit.

Crit Severity

Under the Combat tree, there is an excellent feat called Skirmisher’s Gambit. When applied, you increase your Crit Severity by 50% but you also lose 10% Crit Chance. Choosing this option has three major meet different customers' needs, we provide various neverwinter astral diamonds.You can choose the fastest way which will save more money for you.
It’s 15 points into the Combat tree which would force you to remove 10 points from the Trapper tree.
If you aren’t geared well enough, neverwinter astral diamonds cheap losing Crit Chance could be mathematically worse than the added Crit Severity.
Crit Severity is additive, not multiplicative.
The third point is very relevant because of the addition of the Dread Enchantment which adds 75% Crit Severity on Encounter powers at Perfect and higher. Because of this, many Hunter Rangers can easily stack 160% Crit Severity before the addition of Skirmisher’s Gambit.

If you do go this route, I recommend removing all points from Ancient Roots and Serpent’s Bite and adding them into Fluid Hunter and Skirmisher’s Gambit. If you are geared well enough and play exclusively PvE, this path can deal tons of damage and is a solid option.