takes forever melee

so the kits are cool looking but they give the npc almost infinite health its crazy

The health of the NPCs is not crazy. Their attire protection is.
Their HP is either the vanilla value for the specified type you're using (Scarecrow, Blue Scientist, Heavy Scientist, etc.) or a modified value from plugins such as (BotRespawn, BetterNPC, etc.)
In your case, I guess you refer to the crazy melee/projectile resistance caused by the Frankenstein body parts responsible for the cool look of the NPCs.

If the NPC wears these parts they have a lot of projectile bow resistance and that's why shooting any arrow type is useless. Melee is also not good. All ranged weapons like AK, Thompson, SAR, Pistols, Bot, LR, L96, etc. are fine.

If you want to compensate for the strong resistance from the kits, you can lower the NPCs' health a little bit from the plugin you're using. Or remove the Frankie parts but this will make the bots look nothing special anymore.

Changed Status from Pending to Not a Bug

Changed Fixed In to 1.0.0