I have no idea how would you do it.
It takes almost no damage from Leaden/Widfire and any physical damage without Trusts and solo will be crap. You have no form of gravity or reliable high enough elemental damage to proc it. After 5 min it also goes in 2hand mode and all you can do at this point is wait it through.
You sure that friend isn't trolling or just being confused? Unless it's some super gimmick and cheese strat (or even exploit).