Dungeoneering shields don't cost 300M or 185M respectively.
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Yes very true, if the cost is an issue then sure a shield from dung would be the way to go. Choosing one is hard since they all belong to different combat styles.
I haven't bought any of the shields from dung, I wont pretend to have experience with them and make an uninformed recommendation. Personally I like non degradable items. If there was a non degradable rapier/CCS that cost the same as divine I'd be like screw dung I'll focus on making cash and eventually buy it.
Tbh I love my ely, it's not style specific like all dung shields (no penalties for any combat style), it doesn't degrade, and it's damage soak is nice, and it's sexy!