The power of adding glyphs onto a small group of specifically chosen items essentially forces you to buy the associated item. Their power late game cannot be understated - those that buy the item (and can fit said item into their build) get an additional boost that other gods/builds simply do not have access to.
At late game when everyone has all 6 items, gods/builds that do not include glyph-able items will not have access to an additional buff, thus mathematically putting those gods/builds behind. There's no adaptability here: buy a glyph-able item or lose out on a decent chunk of damage/survivability.
There aren't glyphs for several subclasses of gods. Which item & glyph do you buy on an aa assassin? Are you just now forced to build either jotunn's or go crit?
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