You can spread your 5 toons all around the platform so they are near nobody else (in fact one each can stay on the "jump" platform and still reach Thaddius with LB/LVB). Remember, the charge has a 10 yard radius or so, and you only damage someone else if you have a different charge than someone else who is within 10 yards of you.

The only problem with this strat is that you are now down 2-3 charges each side, which means your other DPS has to perform that much better to avoid enrage. If everyone else in your raid is geared decently (no greens, mostly epics) and nobody else dies, you will make it. If however you have other people who cannot run in time and die, or if your overall raid DPS is on the lower side, you will not make the enrage timer. Its kind of a double whammy too since ele shaman DPS is on the lower end to start with.

btw dunno if its a fps bug or whatnot, and I've always wanted to test it after Thaddius died (but forget each week, lol) -- but one time I just "ran" off the platform with my Tauren and made the jump. I think its Taurens only, if someone wants to test that after a Thaddius death see if running off without jumping lets you land on the platform.