Vanilla buffs and NPC drops

[orangepecan]

Hey guys, is there documentation or an example anywhere for how to code all the vanilla buffs? I imagine this should be pretty simple. I'm trying to code a mod that combines different vanilla buffs together. Specifically, I want to combine vanilla buffs into a single buff.

Additionally, when adding a global drop, is it possible to add the drop to non-boss enemies only without having to check against every single enemy type?

Thanks for any help!

EDIT: Would this be correct for non-boss drops?

using Microsoft.Xna.Framework;
using Terraria;
using Terraria.ID;
using Terraria.ModLoader;

namespace <modname>

{
    public class ModGlobalNPC : GlobalNPC
    {
        public override void NPCLoot(NPC npc)
        {
            if (Main.rand.Next(50) == 0) //2% chance
            {
                if (!npc.boss)
                {
                    Item.NewItem((int)npc.position.X, (int)npc.position.Y, npc.width, npc.height, mod.ItemType("mod item id"));
                }
            }
        }
    }
}