Roshpit Champions 4.1 Winterblight Castle - W arcana Solunia

A variant that use a different defensive boots, as mentioned in my build page (which read like gibberish since i was high on coffee and was still partially since R arcana role was changed from a mostly defensive item to an offense one).
Also use that glyph which make Q auto cast instead of manual at the end of E. This save you some pain of using 3 buttons at once, but at the cost of the dota client more likely going to crash itself since it doesn't like too much things going on.
Max speed in castle is probably around 8~9 minutes something if you know how to fly around moderately and you figure a way that wouldn't crash the dota client as often as it does now.