Klaudteron

__NOTOC__
====
The most straightforward boss, but also the most upgrade/gear dependent to get a decent damage on. 
WARNING: After the Alliance Boss overhaul, Klaudteron has received Root Immunity and Fire Immunity. This makes units that deal Fire damage not great against him (Juhong, Antenore, Jin Elina and more falls into this category) as well as Root ATK gears will be less effective on him.
====
As a new player, you don't have much choices, so here is the most basic setup that can help you to achieve the 1500 battle contribution to have a chance of receiving alliance rewards.
1 Shielded Unit + 4 Ranged Damage Dealer.
* Shielded Unit
** What are they exactly? Any unit with a skill that mention "Perfectly block/dodge" or "nullifies/ignore" X attacks are considered as Shielded Unit. Example of this is Jude, Kuiyung, Layaul, Heidi, Elpaiton. These units will take no damage for the first few attacks, thus buying time for your backline to deal as much damage as possible without worrying about the consequences.
** You MUST upgrade their shield skill to the highest possible level to maximize the effect of this strategy.
* Ranged Damage Dealer
** Use your best ranged damage dealer here.
With this strategy, it should be easy to achieve 1500 battle contribution with all of your attack chances.
====
This one can't be used by everyone. You need healer equips, fantasy companions, normal alliance boss def gears at +15 or shiny alliance boss def gears +10 or above. This level of strength. 
Depending on how strong your tank and heal are, at some level you'll have to start switching damage items to Alliance Boss Damage Reduction gear. The best way to do this is to refine the alliance boss gear that already has -% Alliance Boss Damage for the same thing.
Usually around level 15-16 you will want at least 1-2 items already, and 20+ be fully equipped, but around 22 check if switching back to burst damage doesn't produce better damage again at this point. Early levels, when the damage isn't as high yet, you can try fitting another damage dealer in, watch your battles to find the level where you have to start getting more defensive.Even then, additional healing and buffs on 2 strong damage dealers might result in higher total damage than adding 3rd damage dealer instead.
With the new attendance system that reduces boss ATK for every attendance, this strategy is now easier to execute compare to before.
Update: After the stat overhaul, SK now have easier time against Klaud. This strategy can be used a lot earlier, with just basic shiny DEF gear and fantasy SK with high ennoble.
====
* Tank
** Shamu: Builtin Bleed Damage Reduction. High DEF and a small time of nearly invulnerable that can allow your healers to heal her up.
** Jin Bachmaul: AOE damage reduction. Help to keep your backline survives. Tradeback is less tankiness compare to Shamu.
* Damage Dealer
** Sylar/Hecate/Ash: The 3 boss killers.
** Vampir: Reduces Bleed damage to your frontline by a decent amount, as well as very high CRT buff. Downside is very low damage. So she's more of a utility pick than a damage dealer.
** Other high single target damage that deals non-Fire damage is recommended.
* Healer
** Elle: High healing capability. Downside is no fantasy so might not survive in high level boss.
** Wedding Lin: Decent healing as well as lots of offensive Buff.
** Teana/Filmeti: Both have great healing to front most unit. Downside is not having an AOE heal might be a problem when Klaudteron trigger his Infernal Road.
** Ashes: AOE damage reduction, as well as reducing Klaudteron's ATK and DEF while buffing allies' ATK and DEF. Don't use together with Jin Bachmaul. It's either her or him.
====
Requires that you have Lutes to even work. Why? Because Lutes gives the ally in the front 5 shields when an ally dies. 
With how straightforward Klaudteron is, you only need to keep the frontline alive for the first 40 seconds before he buffs himself. So here's the tactic:
- Use two front-liners: Karan and Elpaiton. Karan dies, which gives Elpaiton 5 extra shields. Why Karan? Because she has a stacking 15% ASPD buff. Why Elpation? He's the only fantasy adventurer with enough damage and shields to be worth wasting a spot on Karan (and to some extent, Lutes). But as long as it dies before Elpaiton, anything can take Karan's place. 
- Since we have 2 spots left, one of them will obviously go to 1 of the 3 ranged boss killers (Sylar > Hecate > Ash).
- The final can be Wedding Lin or any offensive buffer, because she's almost all the amazing offensive buffs. You can also try using another boss killer or high single target damage unit.