You should be able to team up if there's anyone else interested in doing the instance. Unfortunately, not many are questing through the lower worlds these days.
If you need a helping wand, Alia can meet up with you this weekend on either Saturday or Sunday morning.
The trick to get past him (I think), was using Fire dispels to avoid his meteor strike while someone sets up a hit. When he puts up his +200% feint on himself, you strike and take him down in one shot.
Or, if you've access to crowns, the higher leveled storm henchmen usually work.
As suggested earlier, with the limited amount of players questing in Marleybone straight up to Azteca, one will find it rather difficult getting assistance.
As a life, it would be easy for you to heal off the damage he does with his meteor strike which does a base 1500.
Others have also suggested you get gear which specializes in solely Fire Resistances.