You play Regulus 90% of the time, right Soccer? Against an endgame teleganker this might help:
i. Mine the flag with as many tosses as possible before you get close enough to start the telltale flag swirly magic. Three full casts gets you 3600 damage and slow effect. Telegankers aren't thinking defensively, if they are well-synched they might all port onto your mines at once, which is fun
ii. Once you have all your mines in place start running around the flag but make sure you are far enough away from it that you never enter it's LoS
iii. Be ready to snipe as soon as you have a target, adding another 1k dmg even while stunned (haven't tested this in most recent build, snipe might not proc while stunned anymore). Alternatively have warp ready so that all you have to do when a port occurs is click once somewhere unpredictable...
iv. Bring backup - Oak's Shield, Sedna's Heal, or QoT's Bramble are all nice
If you can twist the trap enough times you'll get easy kills instead of giving them but more importantly keep your opponents guessing and off-balance.