I just entered Costlemark Tower (recommended level 55) with a level 56 Noctis, 53 Gladiolus and Ignis, and 52 Prompto, thinking I'd be okay.
However, as soon as I got to the second encounter, I very quickly realized that I will not be okay.
This dungeon is chock full of Galvanades, which
- cut your max HP down while you fight them
- constantly explode
- summon 3 more Thunderbombs at a time when they explode.
Despite them being roughly on par with my party in terms of level (54), they absolutely destroy my party.
This last encounter I was stuck in had me against 3-4 Galvanades, but very quickly turned into a fight against those 3-4 Galvanades, plus about 20-30 Thunderbombs, which made it very hard to see (and live). My experience looked a bit like this video. (Language warning on the title)
Is there some secret to beating them that I'm missing?
Best Answer
I have completed this dungeon and these enemies prompted me to have a search around.
The technique I used was to cook up some Dual-Cast or better Blizzara, to open the fight with and then to use Gladio's abilities, either Cyclone or Dawn Hammer, which will cause them to flinch.
Then it's a matter of prioritising them as quick as you can, if you have Tech Bar boosting items, you can use Ignis' Overwhelm ability. If you can kill or stagger them, they won't explode, thus not spawning the additional mobs.
Gamersheroes recommends,
Other techniques people have used, also work with your bros abilities.
Also worth cooking a meal which helps with elemental resistance.