When the opponents preempt at the 3-level it is much more difficult to enter the auction, especially in the direct seat when the left hand opponent is undisclosed. Therefore, let us look at the 4th seat - balancing before the bidding dies out when you will have the last decision.
We have to be more aggressive, look at vulnerability, high card points and most important is distribution.
We do not require an opening hand. One can double with as little as 10HCP and support for the unbid suits. Should you hold 3 cards in their suit one would require at least 15 -16 HCP.