Platform: PC, PS2, and X-BOX 360
ISP: Comcast
Type of Internet Connection: Cable
Internet Connection Speed: Don't know
Date & Time: 8PM EST Monday and Wednesday
Frequency: Always
Character Name: Byrth
Race: Tarutaru M
World: Lakshmi
Main Job: Warrior
Support Job: Samurai
Area and Coordinates: Maquette Abdhaljs-Legion, (?-?)
Party or Solo: Alliance of 18 players
NPC Name: None
Monster Name: Paramount Naraka, Soaring Naraka, and Paramount Gallu
Steps:
* Put up Sentinel's Scherzo and Earthen Armor
* Still get hit for 2200 damage by the 4-hit combo normal attacks of the Naraka / Gallu monster types


Why this is an in-game bug:
From a design standpoint, it seems that Sentinel's Scherzo and Earthen Armor were designed to allow low HP melee (like Tarutaru) to take part in events with monsters that do severe amounts of damage in single actions. To a large extent they work for that purpose, however, they do not work when the damage is assigned as multiple hits. So, for instance, Gallu type monsters have a normal attack where they swing 4 times and then one damage message shows up in the chat log (2215 in my case). Naraka have a similar attack (~1800) where they swing with 4 swords. Because of these normal melee attacks (not even TP moves), using low HP DD like Tarutaru in Legion is not reasonable even with Sentinel's Scherzo/Earthen Armor and perfect healers/stunners.

If you wanted to allow these spells and abilities to be used as I've outlined, then what I've reported qualifies as a bug. If you didn't, then it doesn't. My linkshell has several Tarutaru that invested a lot of effort into their damage dealing jobs and now cannot use them because their low HP is a liability.