When brewing a beer with that high an OG you definitely want to be sure you are pitching enough healthy yeast. Pitching 3 packs of yeast would definitely do it.
Something you may want to consider in the future- and searching this forum I'm sure you could find separate threads on this topic- is reusing yeast from one batch to the next. Brew a lower gravity beer, then use the yeast from that batch for your next, higher gravity beer. In effect you are making a "starter". And you are making more beer!
Most yeast strains make very good beers of varying gravities. Generally you want to step up from lower to higher gravity beers.
Whatever you do, take good notes. And if you have the resources, brew a lot!