User blog comment:Shockmazta31/Trials/@comment-25816013-20150218182927

A very good way to scrape through Karl the first time is to use a mono-thunder with ores and seals. 5* are sufficient but of course 6* are the most optimal. Here's what I would do:

Eze (leader) honestly better if he was 6*

Rowgen

Shera

Amy

Lodin

Status nullifying leader (friend)

Have Shera use her BB whenever it is up have Rowgen spam his SBB whenever it is up. Use Lodin's BB whenever he is ready to increase the rates the others use their BBs. Amy should just spam her BB which does more on a single target than her SBB. Your friend should help you against statuses: Ronel, Exvehl, Darvanshel, Reeze and even Twins are usable. What I recommend though is Altri/Ulkina but people rarely use those as leader.

Since you don't have a healer I would recommend this item set:

Curex10

Holy Lightx3

Divine Lightx3

Thunder Sealx5

Fujin/Fujin Tonic x2/x3

The only thing to worry about is Karl's 50% when he goes into his second form. It's easily taken care of if you use Shera's BB.