Summoner Comp
This team relies on synergies between the summoner characters and the impressive DPS/range from T. Noah. The chronometer artifact is also very strong in this team, making access to ultimate very fast when at lvl 5 and also increasing key members' survivability.
Note: T. Noah is necessary sadly, otherwise the team would lose A LOT of its damage and range
Lamia Comp
The easiest team to create among the others. This team's greatest strengths are its versatility and easiness to use. Though its damage mainly comes in bursts you can handle almost every situations with this team by sloting-in many characters in the jocker spot generally used by Van Helsing (Cecia for wave clearing, I. Agares for single target, Dalcarlo for range and control etc...) creating many variations in this team's score.
DOT Comp
The goal of this team is to put DOTs through Darcias, T. Hati and Dalcarlo then explode them with T. Hati. The team being mostly melee oriented means that survivability and range are low but this team's true potential lies mainly in Boss battles where its DPS is second to none. It is possible to replace Darcias by a true tank to increase survivability in exchange of lower DPS and play this team in regular campaign fights.
Note: Replace Darcias by a real tank when you expect heavy enemy damage
Summoner Comp
This team is simply the best for this boss. Cecia will automatically target and take out the adds that will appear. T. Noah can take care of both the bone structures and the crystal and S. Aiona will allow the team to survive the boss attacks either by moving the team or through sheer shield and healing power.
Lamia Comp
This team is also quite good for this boss but it will require a bit more effort since both DPS's targeting lack control. It won't be a big issue on this boss though since he's the first and therefore quite easy.
DOT comp
Unless you use Dalcarlo this team won't be able to handle the adds, the bone structure or the crystal but its DPS should be more than enough to kill the boss quickly enough.
Summoner Comp
This team should expect great results on this boss. Cecia can handle the adds alone thanks to her additional heads (due to the presence of 3+ summons on the field), while T. Noah will handle the burst phases on the boss. The overall good survivability of the team should help in the last phase, where the boss's damage becomes very dangerous.
Lamia Comp
This team can obtain good results, too, but would have to replace some characters to optimize effectiveness. You should opt for Ressa instead of your regular tank; her ultimate can become free with her different passives, making her ideal to kill the adds in front of the boss (and give a free full moon). Cecia should take the place of Van Helsing, who won't target the adds by himself, though she won't be as effective in this team due to the lack of summons, so she'll need a bit of help from Lamia to clear the intermediate and last waves. This team can have some issues in the last phase due to the lack of a single target burst, but can manage it with an intelligent use of ultimates.