@Darknezz bruh BDO can literally be be soloed easily, i don't think you needed any teammates to clear a dungeon IT DOESN'T HAVE BOSSES IN THE NORMAL SENSE, i don't think it is equivalent to games that Requires teamwork to beat the games its oranges and Pears. why don't you compare it to WoW or any other traditional mmo which actually required teamwork to beat. I love debuff build , i played soul sacrifice for far too long until i would only use flies to defeat bosses easily, but for a team comp, or even pvp nah healers got way more more value.

@Darknezz then what if the buffer can buff the team to 10 times the output,what if the healer could buff the hero to 100% damage reduction. Put some logical similarities instead of just go to the extreme end. The merit of a debuffer is apparent if you can get enough of them until the healers can't dispel all the debuff . Remember Most games have the spell dispell for dispelling debuffs and even some monster is immune to debuff

@Darknezz but you see, what if the healer can also cast tons of buffs that let you glide through the enemy defences and easily take them down, without a healer you can't even do sustainable damage cause you need to avoid every bit of damage coming to you, teams that have healers have that benefit to just take small damage and only care about big attacks. Let say debuffer make enemy weaker, but without a sustain, the team would have to be more careful of any damage so their output would be less so enemy= 75%(debuffed) vs Team = 90% (focused on defense) but healer team enemy is at 100% but your team could perform at 120% (full output without much care of damage sustained) SO, which is better?