Oh? I was under the impression that Berserk for enemies is literally the same thing as Atk up. So +0.5.
I will admit I'm not sure how it interacts with Atk Down debuffs. It would make sense if it was an actual modifier, so 0.5*1.5, but sadly, quite a lot of things don't make sense in Kamihime...
Here is an actual solo ragnarok Tiamat fight. Nothing fancy, just Brahma as SSR & he apparently found himself a Kirin support (shouldn't be that hard).
Also.. Kingu is fun.
Wasn't the quest doing it off-element, though?
So Tiamat rag looks to be like a significantly less durable version of Barong rag? Both of their raging mode MO are to try to tear down one character at a time. But Tiamat has a listed 7.7 million HP to Barong's listed 10 million, and Tiamat can't wipe your def debuffs.
Doesn't look like much of a problem. Seems like a decently long stun phase so another case of getting it to stun and you're more or less done.
Haven't touched my thunder team in a while though and probably not trying to draw anything for them so no Kingu for me but I'm guessing Raiko will work just fine for helping soak damage. Probably just going to use my light team though. Doubt I can handle it with my wind team, as it's one of my two weakest teams, might try if I spot a Hraesvelgr.
Tiamat's +double is roughly +5-6%, according to a commenter with a sample size of ~277. Double Tiamat got his DA rate to ~20%.
When it comes to choosing from Reiki/Jack Frost/Tiamat as your main:
Reiki's 5% advantage in +water means a higher floor for your offense
Tiamat's +double is for the gamblers/people who really want to up their soul's combo rate cause she's holding back your full bursts :P
Jack Frost is for those leaning defensive against fire (I tend to be in this camp)/have specific defense plans (like if your future 100% damage cut plans rely on eidolon passives)
And then Illuyanka enters the picture not too far into the future. +50% water if you have water eidolons in all your sub slots.
Hmm. If it's 5%, then average attacks goes from 1.14 to 1.24 per turn (from double Tiamat). That's a... ~9% damage increase before we consider synergy with burst generation. The biggest problem here is that if the Soul takes no damage, the amount of turns that you need on average drops from 8,77 to 8,06 - so NOT below 8. That's a huge breakpoint that 5% fails to meet. Thus, there might not be much synergy there. 6% would mean 1.26 attacks per turn, and most importantly, this hits the breakpoint of 7.93 turns per burst.
Meanwhile, 10% elemental attack (from double Reiki) is... in best case scenario ~6% increase. In worst case scenario ~4% (elemental advantage + elemental Relic weapon).
Overall, I'd say that Tiamat is about as good for damage as Reiki is. With Tiamats, your bursts will be slightly weaker, but you might have them slightly more often. And your skills will hit for a bit less.