I dont see any advantage using FC as main line. You just gonna waist your money! Rather buy a good quality high abrasion mainline and use a 3m FC leader.
IMO the sensitivity would not be that much better to justify the cost...rather use braid then( its gonna cost you more or less the same per meter as the FC) .Its gonna give you so much more benefit ie strenght per diameter, sensitivity and capacity.
But if abrasion is your biggest concern , go for a high abrasion mono with a FC leader.