And I, as well as others, disagree. Extremely high strength to diameter ratio, very high abrasion resistance and excellent line behaviour for reaction baits. Crankbaits in particular hit greater depths and have better action on lighter lines, say 10lb Tatsu or AbrazX. Spinnerbaits on fluorocarbon is a no-brainer. In deep cover, and in soft cover, the line stands up much better to the abuse than ANY mono, has better behaviour when pulling fish from weeds and is just generally a better choice than mono.
Most of the issue at hand will be solved with #1 setting your drag properly, and #2 using a line that has better properties than Vanish. Vanish is notoriously low quality line in terms of abrasion and break strength. It's an EXCELLENT walleye line, if not one of the very best, but that is generally applications in which there's little chance of contacting cover with the line, and in situations that diameter to strength is not a huge issue.
@OP check out Bass Tackle Depot right now, they've got Sunline products on sale for a GREAT buy. Excellent introductory, and higher quality, fluorocarbon for a very good price.