In a game full of surprisingly easy Archangel fights, Lamento Mori stands out as the surprisingly easiest. The artbook itself notes that he's unintentionally kinda a pushover.
Changes Lamento Mori's boss subtitle from 'Dreams of Death' to 'The Promised Peace'. Also does a few other things.*
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*(Complete rewrite of all of Lamento Mori's existing dialogue, including dungeon-traversal dialogue. Complete overhaul of Lamento Mori's bossfight and moveset, including some unique mechanics; currently possibly overtuned.)
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FUTURE UPDATE GOALS: AI tweaks, actually remembering to include the full boss moveset, balance changes. Possible minor dungeon tweaks. Possible unique item rewards.
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(mod version 0.9 beta; Fully compatible with 1.1.1 through 1.2+)
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*(Archangel Dubtitles - Robin Goodfellow, Babelith, Mourningstar, Alice, and Nowhere King TBA)