Thanks for the suggestions and positive replies C:
Enderman Kit
Currently for the Enderman kit you get an enderpearl after the first 3 minutes, 6 and then 9.
Finding enderpearls in overpowered is not really that hard, So maybe shorten the time receiving an enderpearl on overpowered.
Swordsman Kit
Gives you Stone Sword with Sharpness 2, 6,5 Damage. Swordsman kit is pretty much useless in overpowered as I said earlier. What I think is a good replaceable sword for overpowered is a diamond sword with sharpness 3 or maybe sharpness 2 with fire aspect. It sounds really overpowered, but remember it is a kit, not something you can find in a chest.
Iron Golem Kit
Gives you Iron Helmet, Iron Leggings, and Iron Boots. Same story as Swordsman kit useless in overpowered, but the first thing is with this kit is the name IRON golem, if it is going to be changed to diamond armor on overpowered it is weird. Because Helmet, Pants, and Boots would be too good in overpowered with diamond enchanted armor I suggest it is going to be changed to a helmet and a chestplate only with protection enchantment with it.
Scout Kit (Speed Potion)
The Scout Kit gives you 3 Splash Speed Potion (Speed 2) and a stone sword with is again useless in overpowered. I suggest changing it to an Iron Sword with Sharpness 1 on it because it is not a Swordsman Kit but not too bad of a sword with the kit. And also maybe increase the time of the speed potions to something like 30 seconds.
Archer Kit
Gives you a bow with 10 arrows and a chainmail chestplate. In overpowered should an upgraded bow be useful, Maybe a punch bow would be interesting.
And I suggest removing the chainmail chestplate, it could be upgraded but I think it is too overpowered if you already have got a bow with punch.
This is what I was thinking of for the gamemode overpowered, maybe some kits should be nerfed on basic.
More suggestions are welcome.
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AlainGlitchr