10-16 Bleed Stacks from Special Attacks.
3.5-5% Strength for 3.5s on Hit. Stacks 5 times.
Immune to Ranged Attacks for 0.6-1.2s on Weak Spot Hit.
Gain Suppression Immunity for 2.4-3.6s on Weak Spot Hit.
General Concept:
The chainaxe special attack has insane DPS boosted by Bloodletter, but can cause you to take hits sometimes, this is why I use Crit bonuses here, you can take more hits in short time and loose less health during the special attack, than with other lvl 5 talents. Plus crits counts towards damage to all armor types and you will be the one dealing with Crushers, other ogrin enemies as well as regular unarmored and flak armored enemies.
If you are good at dodging, you will be good with this build. If not, it's good for getting better at it. You will also learn when it is safe to use the special attack in more and more crowded situations and pick off the dangerous enemies.
How to use:
General rule is, fight ranged with ranged and melee with melee. Use the Vraks Headhunter a lot, it is very ammo efficient, you can also shoot roaming trash enemies. Stay with your team and protect them from charging elites and specials.
Against hordes: - This is why you need extra stamina and stamina regen, it enables frequent use of the push attack and dodging. You can fight the horde alone and not take damage this way. Usually your allies will have a better horde clearing weapon, but you can hold your own. Use a combination of heavy attack and push attack when enemy density is high, then the primary attack when density is low (even the primary attack can hit 2 horde enemies).
Against shooters: - Use the Vraks Headhunter. If you charge groups of enemy shooters, you are likely to take a lot of damage.
Against specials: - Your primary target. Charge (chastise the wicked) them, spin the chainblade before you reach them and use the special attack (you get a guaranteed crit). If they survive, they will bleed out. Mutants may need a few more hits.
Crushers and similar - preferably kill trash enemies around them first (even shoot them if you have time), than work on the crusher. The chainaxe special attack stun locks crushers most of the time, but you could be hit by someone else, it's better to be safe. Use the stun grenade if enemy numbers are overwhelming
Note:
Shred Blessing is not available for the Chainaxe, despite what this site says. Otherwise I would take it.