Welcome to Lore-master build, here you will find a great endgame build for Yellow LM (primarily for support/debuffs/healing). I have skipped Red and Blue LMs because they are not required for endgame content.
Lore-master
LotroHQ – Class Builds, Tips & Tricks for LOTRO
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LotroHQ - Class Builds, Tips & Tricks for LOTRO 