Here is an alternative method that I found to be pretty consistent but still requires luck and timing as well as a decent team to keep the enemy off the point long enough for your ultimate to charge.
The map you want is Nepal: Sanctum. It's a control point map and this specific point of the map will come up randomly. It could be the first or last, so again luck will come into play.
Once your ultimate is ready, wait for the enemy to have the point captured or for a bunch of them trying to take it. On the left hand (or right, will be random) coming from the spawn there is a small health. This is where you want to boost your mech from. Stand there and aim for the smallest globe of light at the top. Use your boost (
) and then right after press
to activate self destruct. If your timing is right, it should blow away everyone on the point and they will not see it coming from above.
See the video for a better idea of what to do.
Quintuple kill:
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Quad kill:
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Other videos to help with launch spots on other maps:
*** Spoiler - click to reveal ***King's Row attack triple kill:
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King's Row attack double kill:
Route 66 attack triple kill:
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