This, since at moment we haven't seen her use her third sword in a fight yet so we don't how drastic it is in combat, though we do it's drawbacks.
though thinking about we don't know exactly how Fionn uses Fintan in combat in either, since the only time we saw him use it was a gag event where it was used for a lackluster reason and got a lackluster response from it. As it is Fionn's most iconic ability and his most well know legend I would like to see him use it more seriously one day.
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I just suggested the fight since I was interested to see what was better on a whim, Buddha Wisdom or Fish Wisdom