I thought of a duo queue renekton build
I have personally always thought of
as only a top laner, however i was playing him today and thought of a build. This build makes him effectively a mid laner, however (I believe) would be more suited to bot lane. It could also still be played top, providing you have an auto-attack based jungler -
for example. The Idea is that you and your duo queue buddy group, then
uses his ultimate.
The build is this:
and 
This build will make your ulti do a lot of AoE true + magic damage, and allow you to heal quite a lot as well. I've seen it do around 300 dps which, if you use it on a large group, is really quite good for healing, and can kill a
in around 6 seconds. This is quite good, as your ultimate lasts 15 seconds and your E allows you to get to the back line, and can make you assassin - like.
Also, I have tested and this build can solo baron, presuming your ally is near enough to proc Zeke's when you begin. However this could be due to
as a champ, not the build.
Its a strange build but I find it quite fun, as people are not expecting this much damage, and definitely not magic damage, which catches them by surprise, and will allow you to deal a lot of unexpected damage, as they will likely see renekton and go for armour.
might be better.