will steeda balljoints be fine with mach-1 suspension?

They'll work fine with that suspension level. The benefit of the X2 balljoints is raising the roll center a tad. With the Mach suspension, the RC really isn't getting into the zone that produces crappy handling so they may be overkill for your application. However, the front suspension can use all the help it can get if you're really looking for performance handling. The X2 balljoints won't hurt you in this respect.