what is up with this guy Ive gone in with a party four all with at least 2 three star weapons and every time we make it to the boss we just get rolled BAD i mean i can understand that its a challenge but i mean we hit him once and he then instantly heals its getting to be an increasing frustration to deal with him i think if maybe you didn't put as many other jelly's on the field wed at least have a chance of beating him or maybe make it so the jelly gems drop from fused jellys or something because as it is its freaking hard to even damage it
Jelly boss
but wont he just heal if u hit him he heals like +56 after i hit him so its like our hits arent even grazing him
If you poison it, it can't heal.
The ignite and curse it for good measure.
Use them vials.
Instead of vials, I'd suggest using bombs- you get more than 3 uses of the same status effect, and are less likely to lose those uses due to a small error in aiming. Have one teammate alternate poison/swords, and another continuously drop freeze bombs, while the remainder whack at the jelly king.
I'm half convinced that the jelly king only throws out new jellies up to a certain set limit, in fact- which means that if you can freeze the whole mob in place away from the king, they'll leave you basically uninterrupted while you work, and no new jellies would be spawned until the current mob died. In order to pull that off, you'll probably need a freeze bomb of 4* or higher quality.
I've found that it helps to use the respawning blocks to block off the mobs and focus on the boss
Carry 3 Poison Vials. Lob one at him to stop his poisoning, then go up and beat the snot/jelly out of him. When you see him charging up to do the spin attack, back off and heal. Once he stops, poison him again and repeat. It's not too hard if you know when to attack and when to back off.
Protip: He doesn't heal when he's spinning all over the place.
As everyone mentioned, are almost required now if you don't have the necessary bombs or a Vile Striker.
Another protip: I've had problems when I lobbed vials and missed because of all the other slimes getting in the way. If you must, charge at the King with the vial in your hand so when you get hit the vial breaks near him.
Well I beat him... He is tough, but not impossible... I recommend a Jelly Shield. Shield his attacks whenever you see him charge up, and run to the side of the Jelly King with no monsters near. OH and use your vials! Poison and Curse are useful! Shock, Fire, Ice and everything else are good to calm the crowd of slimes down.