Hello everyone and welcome to my 248th analysis, this time featuring Warmaster Barbael.
Overview: Barbael's fantastic Base Speed of 3575 allows him to outspeed a majority of deniers and deny them before they move. Not only that, but Barbael has access to other interesting status effects like Ignite, Sunburn and Trait Disable, all of which are among the best debuffs one can apply. Aside from having Tough as a trait, Barbael's trait also comes with a Damage Boost to the team, making your attackers stronger just by existing. While Total Blind as a deny method isn't the best thing one can find, Barbael's impact on the battlefield is still undeniable (pun intended).

Builds:
Monsters that have access to Group 4 skills will have a slightly different build path. I will list the most viable builds for each Rank since some moves in Group 4 are pivotal to some sets' success. The monster's role will likely remain the same, however, so this won't be exhaustingly long as I won't repeat the same things.

Rank 0
Moves:
-Trait Treaty
-Sightless Crowd
-Welcome to the Average
-Expiate Sins
Runes: 3 Speed/3 Team Speed
Mutant Rune options: Speed&Life, Team Speed&Team Life
Relics: Traps and Shields

Build Explanation:
Trait Treaty is an AOE Trait Disable + Ignite, stripping enemies of their annoying traits like Anticipation or Hardened variants and racking up damage with Ignite. Sightless Crowd is Barbael's deny move which also applies Sunburn, working excellently with Trait Treaty's Ignite. Welcome to the Average just disables the trait on the target, and being a single target move makes it important because it allows Barbael to cripple Dodge Area monsters, given that they dodge Trait Treaty and Sightless Crowd. Lastly, Expiate Sins is great for more aggressive gameplay, applying both Sunburn and Ignite at the same time which results in great damage over time.
3 Speed with Life Mutations is the standard denier spread. Barbael is also a very notable Team Speed carrier if you want him to do that, since he will likely outspeed almost any other support he will face and cripple them along with their teammates, leaving room for a more reliale denier to hold 3 Speed. Use Team Life Mutations in this case.

Rank 1: Barbael learns "Spiritual Sight" at this level, a move that gives Blind Immunity to his team and removes all debuffs from them.
Moves:
-Trait Treaty
-Sightless Crowd
-Spiritual Sight
-Welcome to the Average/Expiate Sins
Runes and Mutant Runes are the same as given above.

Build Explanation:
Spiritual Sight is a very valuable move. It's Barbael's only support move that buffs his team, and a good one at that: debuff cleaning is always welcome, and Blind Immunity readies your team for opposing Barbael who might try to use Total Blind moves on you, or against any Precision modifier strategies the enemy might use. The last slot should be decided depending on the enemy team; if they have Dodge Area monsters, keep Welcome to the Average. Otherwise, get Expiate Sins.

Rank 2: Barbael learns "Purifying Pact" at this level, a Base 70 single target Fire move that applies Sunburn and Ignite to all enemies.
Moves:
-Trait Treaty
-Sightless Crowd
-Spiritual Sight
-Purifying Pact
Runes and Mutant Runes are the same as given above.

Build Explanation:
Purifying Pact is a massively upgraded Expiate Sins that applies the Tortures to all enemies and has a massive 70 Base Power, which when combined with his trait, will do noticeable damage even without Strength Runes. This is Barbael's most offensive move that works excellently in offensive strategies. Welcome to the Average's power level is simply too low when the other option is considered, so it's no longer used.

Rank 3: Barbael learns "Master of Pain" at this level, a Base 90 single - wait a minute, that is not what this move is! Ahem...
Barbael learns "Master of Blind" at this level, a Base 15 single target unresisted move that applies Total Blind to all enemies and gives him an extra turn.

Moves:
-Trait Treaty
-Spiritual Sight
-Sightless Crowd/Master of Blind
-Purifying Pact/Master of Blind
Runes and Mutant Runes are the same as given above.

Build Explanation:
Regardless of how crazy powerful it sounds, you might still want to run Sightless Crowd over Master of Blind, since Anticipation monsters might ruin you otherwise. You can also decide to run it in either of the last two slots if you value both Sightless Crowd and Master of Blind, since Total Blind is unlike other deny methods in that you can use it on consecutive turns and not get a Recently Denied buff on enemies.

Rank 4: Barbael learns "Trait Covenant" at this level, a Base 20 single target Fire move that applies Trait Disable to a single enemy and Total Blind to all enemies.
Moves:
-Trait Covenant
-Spiritual Sight
-Purifying Pact/Sightless Crowd/Trait Treaty
-Master of Blind/Trait Treaty
Runes and Mutant Runes are the same as given above.

Build Explanation:
With Trait Covenant, Barbael is able to deny even Dodge Area monsters, since the attack itself and the Trait Disable is single target, and the Total Blind follows both of these effects. In the last 2 slots, the decisions should be made based on your playstyle and the enemy's team comp.

Teammate Options: Given Barbael's trait, attackers are a no-brainer. However, something special about Barbael's Damage Boost is that it also affects Artifact monsters, so allies like Talos and Nitroblaster can finally get a boost without giving up their Traits. Buff removal can be important alongside Barbael since some enemies might carry Blind Immunity with them, which will strip Barbael of most of his power. Do also know that Barbael works very well in Torture teams, so allies like Wangzhou or Nabuline to apply diverse Tortures will rack up damage alarmingly quick. Extra turns remove Total Blind with great ease, so bringing Anticipation monsters with you is a good idea. For more Teammate options, check out this article.

Countering Warmaster Barbael: A Barbael of your own is one of the best counters, since Spiritual Sight cleans anything he might try to do to you and gives you Blind Immunity on top. Any extra turn attack will get rid of Total Blind. Torture Immunity comes in handy since he does carry many Sunburn and Ignite moves. For more Counter options, check out this article.