Emmmmmmmm.
When I was playing GT5 in servers, I always met some Skeletons which equiped with GT arrows.They seldom killed me, though some arrows,like Pu or U, is pretty awful(radiation) .The skeletons only have poor 10 hearts, but for players, there always have tooooo many mods that can reinforce them.Unless you are playing pure-GT.
Also, some useful mods, like Dynamic Surroundings (can show your buff directly without using GUI) , Keeping Inventory , Gravestone even OpenBlocks are ready. If you do not like them, just have /gamerule.
In server, they mainly use plugins. The players will not drop their items in Overworld.But in worlds like Nether , End and so on, they only depend on their good luck.