As an interesting bit of trivia, the word "Loatheb" is an anagram for "Healbot" and considering his abilities, this is likely an intentional joke by the developers.
Abilities:- Loatheb has around 5 million HP
- Corrupted mind Loatheb places a 1 minute linked cooldown on all healing spells, including cleanse/dispell/depoison. This means you only get 1 healing spell to cast per 1 minute, including cleanse/dispell/depoison. Anything that heals, removes a debuff, or otherwise prevents dmg on others (PWS) pretty much is affected
- Poison Aura melee range. 196 Nature damage inflicted every 6 sec in 10 yards. 12 seconds duration.
- Inevitable Doom Loatheb begin to cast it after 2 mins in fight. Inflicts 2550 Shadow damage after 10 sec. 100 yards, every 30 secs. 5 mins after engaging, this will be every 15 secs.
- Fungal Bloom Critical-hit chance increased by 50%. Spell critical-hit chance increased by 60%. Spells and abilities cause no threat. Get from envionment, you can control who gets it. 90 secs duration, every time only 5 people can get it.
Strategy:As soon as Inevitable Doom is inflicted all raid members should leave the 10yard range and bandage. As it has a 30 second cooldown, quick work will mean your "recently bandaged" debuff should be down by the time it is reapplied for the second time. This is nothing but guesswork based on the minimul facts presented.