Couldn't you also like, have someone continuously sac themselves and get a minion army up, and then have that person sac themself again to get a well up? That should work long enough to get the 15 seconds, so long as you can keep your minion army alive... two N/Mo's should be able to do it. One with the 55 HP build, and the other with Vengeance or Unyielding Aura, as well as the MM/Wells build. Have the 55 Sac himself once to get down to 1 health, then equip a vamp weapon. BR the MM first (if you can) and then have the 1 health person kill himself with the vamp, minion, res, dead, minion, res, dead, minion, res, dead, minion, res... etc as long as you can keep up with the steady stream of energy (maybe a 3 person team? 1 person Mo/N, other N/Me for echo or E/N for energy, and the saccer). Once you get your army up, then have the saccer kill himself again, body block the guy, and set up the regen well. That should work enough to keep him alive for 15 seconds. Or so I'd think, its just a matter of keeping your minions alive for long enough.
Edit: Sorry for the random, unordered post... I was typing while I was thinking, so thats how my thought process went