Hello Bdubyah,
i'm testing your mod now and found an mistake in progression.xml
<attribute name="attLuck" name_key="attLuckName" desc_key="attLuckDesc" icon="ui_game_symbol_loot_sack">
<effect_group>
<passive_effect name="LootGamestage" operation="perc_add" level="2,8" value="5,35"/>
<passive_effect name="LootGamestage" operation="perc_add" level="9,10" value="40,50"/>
Your values multiply the LootGamestage value from 5 to 35 times and then 40 and 50 times.
I tested it on player lvl 300 and after LootGamestage 10k u can't find any loot.
According to description it may just increase 5% - 35% - 40% - 50%
Mb values schould be 5,35 - > .05, .035 — 40,50 -> .4, .5 ?