So I think the game has really gone out of its way to create a near almost impossible skill check in the form of a boss called Arachtagon. I've tried various amounts of tactics but I cannot bring myself to have any kind of chance against him.
This is what I've done so far:
1. I've tried to prevent him from using spells. If I miss my attempt then Serena is locked out from using any other useful debuffs. If I succeed the boss resorts to using Volley of Stings, which is a pretty ridiculous AoE that takes 30-50% HP each turn. There's simply no way at all to recover from it with heals.
2. I've tried using Sap and just attack him as much as possible but there's simply no time to go with this strategy as he's constantly taking out your attackers with powerful cancel magics.
3. I've tried just adapting to what he does but the RNG is all over the place and he can make some pretty ridiculous combos where there's simply no chance to recover. I'm finding myself in that tiresome scenario where I'm just constantly trying to recover from his powerful double turns and it's simply not possible if I'm not super lucky with the RNG.
4. I've tried saving up my pepp power but he constantly cancels my characters so that they cannot interact in pepp combos.
I've tried finding info about this boss but not even the wiki has any strategic info about him. You can't even find if he has a weakness to exploit. So what did people do to overcome this on Draconian difficulty? I really, really do not want to remove this difficulty but this boss might just not be possible for me unless I put myself through some real grinding and I'm not willing to spend my time with the game like that.
Yeah, he's a super huge pain in the ass. I reccomend, like I said, trying to do a little extra leveling, maybe explore a bit, and try to get accessories that can reduce the chance those stunning abilities land so you can enjoy a little bit of leeway when they are going off.
This is what I mean't when I said "Physical" bosses, his attacks are going to kick your ass, and you gotta hope that Rab is going to support you during it, he's cast Healing magic when somebody is low on health, but I'd think of it as a supplement, don't rely on it.
Like I said before with a different thing, I couldn't get past this guy if I didn't use defensive techniques to occasionally block attacks from that guy, he is So rude!
I even still have a PS4 Video of me beating him with just my hero at like 4 HP, but before you get to that point, you gotta make the most of your characters.
Sylvando can deal effective damage, Erik can do poison and capitalize on it for damage, Serena can heal and buff defenses (if you have Kabuff, or at least Buff on two characters, get some effective armor and apply that shit, it's worth it! If you haven't alreat, the Gallopolis Horseraces has armor for the main character that's really effective for when you can get it!) and Veronica can get Knocked out in one shot after doing a Sap or two.
If you can enter the fight with a Pep Power, that would be super great depending on what you can get. Erik and the Main Character doing an improved Trap attack is really good, as is anything that can raise survivability or debuff resistance, I don't remember what Pep Powers are avalible at that time. You can switch a party member who has Pep out of the party to put them back in for the boss if you want to save it!
Do your best and I'm sure you can beat him! Don't give up, Stonger Monsters is a lot more fair after this guy!