The numbers listed here are based on the higher stats that everything takes on once you begin your second DLC; as such, they are the absolute maximum that can be acquired. The Skybreaker heavy bow and Skybreaker spear-thrower are both stronger than their counterparts, but everything else is equal in damage. Choice in design and material comes down to personal preference in perks.
Total Damage: 496
Champion's Lightning Longbow
Ammo: Storm Arrows
Perks: Energizing (restore 10% energy after killing an enemy).
+10% damage.
15% wildlife damage.
15% weakspot damage.
(choice branch perk).
Design: Scimitar Palm Branch or Blood Vine Branch
Heartlands Stormglider Horn or Canyon Stormglider Horn
Islet Palm Bast
How to Get:
Equipment container at Command Station Bravo (Spokes on the Wheel) (Skybreaker).
Spires Artisan Longbow
Ammo: Grenade Arrows
Perks: Payback (deal +30% damage for 20s after breaking line-of-sight from hostile enemies for 5s).
+10% damage.
15% stealth damage.
15% weakspot damage.
(choice branch perk).
Design: Scimitar Palm Branch or Blood Vine Branch
Murky Waterweed Bast
Heartlands Stormglider Horn or Canyon Stormglider Horn
How to Get:
Receive from Nentuk (Spires).
Branch stat to aim for is 214.
Bast stat to aim for is 137.
Horn stat to aim for is 94.
Scimitar Palm Branch: Steady Aim (move speed while aiming increased. no effect mounted).
Blood Vine Branch: Powerful Draw (+20% damage when your longbow is fully drawn).
Total Damage: 697
Champion's Pyre Heavy Bow
Ammo: Flame Arrows
Perks: Revitalizing (restore 10% health after killing an enemy).
+10% damage.
15% wildlife damage.
(choice root perk + choice bast perk).
Design: Windbent Tree Root or Dark Root
Heartlands Reed
Islet Palm Bast or Murky Waterweed Bast
How to Get:
Equipment container in Operating Base Alpha (The Bitter End) (Skybreaker).
Root stat to aim for is 350.
Reed stat to aim for is 137.
Bast stat to aim for is 137.
Windbent Tree Root: Quick Draw (heavy bow draw time reduced by 20%).
Dark Root: Focused Draw (doubles the heavy bow exhaustion timer).
Islet Palm Bast: 15% wildlife damage.
Murky Waterweed Bast: 15% stealth damage.
Total Damage: 448
Rallying Cry
Ammo: Poisoned Arrows
Perks: Affliction Effect (+25% damage if the target has a status effect).
+10% damage.
15% wildlife damage.
15% weakspot damage.
(choice resin perk).
Design: Patient Elder Resin or Spires Greatwood Resin
Heartlands Stormglider Horn or Canyon Stormglider Horn
Islet Palm Bast
How to Get:
Do the "The Sky Breaker" main quest (Skybreaker).
Homeward Shortbow
Ammo: Flame Arrows
Perks: Revitalizing (restore 15% health after killing an enemy).
+10% damage.
30% weakspot damage.
Design: Patient Elder Resin or Spires Greatwood Resin
Heartlands Stormglider Horn or Canyon Stormglider Horn
Screecher's Reed
How to Get:
Complete the "The Fight for Home" main quest (Spires).
Resin stat to aim for is 171.
Bast stat to aim for is 137.
Reed stat to aim for is 137.
Horn stat to aim for is 94.
Patient Elder Resin: Reflex Shot (gain snap aim-assist).
Spires Greatwood Resin: Fusillade (+15% damage on up to 4 hits against the same target).
Total Damage: 813
Athlete's Spear-Thrower
Ammo: Shellbreaker Spears
Perks: Wounded Fury (deal +25% damage when you are under 40% health).
Powerful Throw (increased range).
+10% damage.
15% wildlife damage.
(choice bast perk).
Design: Petrified Forest Thanator Bone or Canyon Bone Helm Rhino Bone
Heartlands Reed
Islet Palm Bast or Murky Waterweed Bast
How to Get:
Do the Only the Nimble Running Challenge during the "Champion's Trail" side quest (Skybreaker)
Bone stat to aim for is 454.
Bast stat to aim for is 137.
Reed stat to aim for is 137.
Islet Palm Bast: 15% wildlife damage.
Murky Waterweed Bast: 15% stealth damage.
Total Damage: 530
Opportunist's Shotgun
Ammo: Storm Ammo
Perks:
Efficient Tactics: deal +20% damage on next attack after hitting a weakspot.
20% weakspot damage.
How to Get:
Defeat a Dragon Patrol Convoy (may take several attempts).
So'lek's Spires Shotgun
Ammo: Storm Ammo
Perks:
Chain Reaction: +15% damage on additional hits against the same target. Stacks up to 3 times.
Locked and Loaded: +15% damage to marked enemies.
How to Get:
Trade with So'lek.
Total Damage: 35
Flashy Assault Rifle
Ammo: Stagger Ammo
Perks:
Lethal Momentum: +25% damage for 10s after killing an enemy.
Sliding Strike: +20% damage on next attack after sliding.
How to Get:
Defeat a Dragon Patrol Convoy (may take several attempts).
So'lek's Spires Assault Rifle
Ammo: Stagger Ammo
Perks:
Chain Reaction: +15% damage on additional hits against the same target. Stacks up to 3 times.
20% RDA damage.
How to Get:
Trade with So'lek.