1way stretch fabric for 2way stretch pattern?

Here is my problem of the day. I have a one-way stretch lycra
material that I need to use for a two-way stretch bodysuit pattern.
The fabric does have a "slight" stretch in the second direction....but
not the 75% that the pattern calls for.
Am I better off....
#1 - Using the stretch for the width and adjusting the pattern to
accommodate the length that isn't provided for.
#2 - Cutting the fabric on the bias so I get some stretch in both
directions.
Anybody with experience on this type adjustment...I would love to hear
suggestions.
Joy