Armaghan/Zoltrix/Hyperactive_Knucklehead_Ninja/XENEX/Armaghan_Ali is an active mapper and speedrunner. He had been accused of cheating because of his fast chimneying, but he proved his legitimacy by submitting some impressive and legit chimney scores to NReality.
See some examples here:
All these chimneys were done in speedrun mode.
Apart from chimneying he also makes speedruns on the latest NUMA maps. He has 30 star counts and 400+ 0ths on numa maps.