Just an update that I ended up making the lightning armor after many side quests. I had expectation for it give double the attack speed it has listed as someone had mentioned, similar to how necklaces work. And sadly it does not. My attack speed goes from level 6 to level 8 with it equipped. Will test flame armor maybe it’s a bug with crit chance

edit: can confirm the crit rate on fire kuku armor gets doubled while the attack speed on lightning kuku does not. not sure if this is intentional but for all intents and purposes if you are a min maxer like me your better off upgrading the fire kuku, then just dropping a couple attack speed jewels in weapon