rendermen are loving annoying.
they aren't fun, skilled opponents, or really anything other than a major pain in the ass
their health is flat out insane, almost as much as lavagod, they spawn wherever they want, and with 50k defense they one shot me after i hit them ONCE with my spear because they teleport to you.
it's not fun.
renderman gets into spawn, 5 minutes of pure death messages for chat then finally someone can kill him.
trying to get across the mountain troll area, no matter how i do it, the renderman spots me and instakills me.
tried using dash, jets, anything, there's no way to not be in his sight
it's annoying beyond belief
a good way to kill them is how i managed to rank up so i could kill the mountain trolls and lava monsters.
first start by killing many monsters with a good amount of health so you can get lots of gold.
second if you see a golden koblod and nobodys watching kill it, you can find golden koblobs in the goblin den,place near the mountain trolls (where they all are) the entrance to the shadow area and lava monster area and the place where you get the golden sword you can see koblods ontop of the large cube bricks.
getting gold allows you to get potions which can be used to rank up, you might want to get lots of gold like i did (i have about 60000 gold i think) and spend it all on potions and you should be able to kill the renderman easily