Most used skills in PvP(from Faction Tree)

Kill Skills (Burst damage):

1. Magnificent Spirit

MS can one hit most low hp factions. Its downside is that it’s single targeted and melee.

The special about MS is that it can hit through damage reduction shields because of the white damage. 

2. Obscura

Our main kill skill, very effective in large scale PvP. 
Downside is that it uses up all of our SP and HP(only 1 HP left). So very often we end up dying after casting obscura because there are too many rebounds/reflects around.

DPS Skills

1. Pure Essence

Our highest DPS Skill, it causes also random negative effects with a decent chance.

2. Thunderblade

TB’s DPS compared to PE is lower but higher than any t4 skills or below, the paralyze effect strength is too low for asc. PvP, the silence effect (600 strength) with low chance isn’t very effective either.

Debuffs:

1. Deep Freeze

A very nice skill which has a huge cast range. Usually it’s combined with MS and Obscura. Tomed it has 60 sec cd, the cd can be also reset with the Esper "Ruby Pagoda".

Shields:

1. Nameless Way

Our main pvp shield with a nice damage reduction, tomed it has 95% chance to reduce 90% of incoming damage. Unfortunately it doesn’t protect us against skills that do white damage such as MS, Slaughter 2. It is also removable e.g. from Lupin’s Forgotten Dream. 

2. Faithful Defender

This shield doesn’t really absorb a lot of damage. Although it might help us to survive a bit more against certain skills.

3. Air Shield

A great PvE shield, the def in asc. PvP is useless though. Still we use it to get 1k more SP and some more buff icons.

4. Ice Aptitude

This skill is actually only used to reset the cd of Wanderlust.

5. Ice Barrier

The shield protect us against Bleed or HP reduction, it also heals our HP. We can’t move or use any skills while the "Frost Protection" effect is on. It’s a not bad way to counter Skyseeker+fasting since we can

And what’s special about Dagos Jadeon?

Compared to Jadeons from other Affinities:

Pro:

Higher AoE burst damage (Refined Vigor 2 before Obscura)
Many skill evasion buffs (Wanderlust 2, Eternal Recurrence 1+2(from Dagos Chroma)
Higher movement speed (Wanderlust 2)
Ability to debuff and fast (Harsh Reality 2)
Advantage from Dagos General Skills (Day of Remembrance, Parting Grief, Beyond of the Gray Sky)

Cons:
Lacks of various Kill Skills
No Ability to remove negative effects/Sky seeker
No unlimited Nameless Way
Many Skills have long cast time

Dagos Affinity Faction Skills

1. Wanderlust 2

You can use it either when you want to chase someone or use it as a shield because of the Skill Eva. 

2. Refined Vigor 2

This skill gives 30% more damage to next hit. Use it before Obscura 

3. Harsh Reality 2

A very dangerous Skill which removes up to 6 positive Buffs from targets + 20 sec fasting with 50% each hit (75% chance with both hits).

The only downside is its cast time, in 6 seconds you can either get killed or your opponent will just run away. However buffed up with Shields (this skill also gives ~10k DEF itself) you won

Dagos Chroma Faction Skills

1. Thunderblade 2

Most effects require a higher level, but even at level 1 the Sleep Immune effect can be useful against Skysongs, also it’s possible to paralyze targets if you got enough para res. The DPS will be much better than TB1.

2. Pure Essence 2

PE 2 can remove para effect with a great chance at higher levels. And like PE 1, it’s our main dps skill, although the chance for negative effects is too low, even at higher levels.

3. Embodiment of Truth 2 

It doesn’t increase much Hp, nor does it stack with EoT 1. However the "Furious" effect is very nice. At level 5 it already stacks up to 5 times, if you got 600 para res e.g., it would be 3000AP more after getting hit 5 times.

4. Dragon

Credits go to Luckystone.