I'm not so sure it would be "better" for crankbaits. Around the lakes I fish, locals "push/pull" cranks on braid w/2oz weights ... but tied to a 5-6ft leader of 6lb test mono. When running at around 1.8mph ... you need a little "shock absorber" to keep from ripping the crank's hooks right through the fish's mouth. Many fish are hooked as often in their "face/lips", as they are "inside" of the fish's mouth. Straight braid would likely rip the hooks loose, unless you left your drag pretty loose.

I think many whom longline troll with cranks (no added weight) use 10lb test mono. It might be because the trolling depth charts are calculated on 10lb test line diameter, or because 10lb test line diameter is the most accurate line size for line counter reels.

Those longline trolling with jigs (no added weight) seem to use mono lines in the 6-8lb test range. Braid in the 10lb test/2lb diameter may not be as bad with jigs, as with cranks, since the jig only has one hook & it's pointed straight up ... more likely to stick the fish in the roof of the mouth, thus being less likely to be pulled free or ripped loose. It would also be easier to pull a hook free from a snag with the heavier test braid, since the jig hooks are much lighter in strength than the average crankbait hook (not to mention that there are 6 hooks on a crank, that could possibly hang up).

As for using braid to "spider rig" or "push" jigs .... see my comments about longlining jigs with braid. You're essentially doing the same thing, just not moving as fast Spider Rigging, as when Longline Trolling. I push jigs with braid ... but, I use 12-18" mono leaders for my jigs. I'd use the same setup if I were to slow down & Spider Rig with those same outfits.

... cp