Demonic Circle Range?
Demonic Gateway is 70yds... Demonic Portal is 30. Portal is a much shorter cast time, and the effective radius is a circle instead of straight line between two static points. Additionally, portal goes through walls and breaks slows/roots. If you expect you'll have to move a lot for your portal, take the extra global to move it behind a proper LOS, or just don't get baited away from it without having a reliable self-peel.
Drop the portal on one of your gates, before the duel starts (of course, y'know, people might whine...)
Or use the eye glyph to put it up on something, then challenge.
i just use an addon that keeps track of wether or not i am in range, its not hard to manage fighting and tracking your distance
Damn it, what this guy said.
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