Yep, stay cheap on the crosses you'll be fine. I don't see any benefit to using a more expensive multi. If you want to soften your stringbed even more, drop the cross tension to the same as the mains.
Wilson Six.One 95 16X18 Pacific Natural Gut mains @55/TF NRG2 17 Crosses @55
Strung Weight 357g 352g Balance 31.5cm 31.3cm