My opinion: Solo both portals at the same time. Maybe send an extra in for a few seconds to fire off a few rockets then leave if the two soloers aren't 100% competent at soloing. This is easily the quickest most efficient method IMO.
These are the 3 main strategies ive seen used with only mild variations, so if you use a method similar to one of the above vote for that one.
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Edited by Gamenjoyer: 11/26/2014 8:48:50 PMAnyone who doesn't have downy's can solo a gatekeeper in 5seconds or less (regardless if they have G-horn) People who voted for option 2 and 3 are scrubs... And the people who vehemently defend option 2 as being the best make me want to take my bedazzled yarmulke off.