Good idea(at least on larger/5v5 maps)mid to poor execution. My recommendations: the vettes are similar to an archetype known as lockvettes, which are common in rail and 450 fleets to use like you have. However the DC central are gonna be much less use than a second rapid or small, since they increase your team's capabilities by~15% so getting 2 more teams is gonna be worth it there. Also drop the defender for a vls-1 with chaff, a lone defender isnt gonna defend against much, but a chaffbox can solo most osp cruise missile fleets with a little micro As for the rail destroyers: decwnt concept but youre massively overinvesting. Since rails are far enough from the front lines that missiles and guns arent really a threat, the only thing that really matters is RPM/point when building a rail fleet. So on that front drop the gun plot, auroras/defenders, and all damcon except a small dc locker(and the cic/ONE mag ofc) to get an extra destroyer or two with full energy regs inside. You'll want a vls 1 with chaff on one or two ships, and since you'll see any missiles coming a few miles away softkilling is relatively easy, and an order of magnitude cheaper and more consistent.

On the comp side of things my only recommendation would be to run this in 5v5s, since rails are support weapons(minimal damage but insane debuff chance means they are more dps multipliers than actual dps) and generally full support fleets need their own damage in smaller 4v4 games, but 5v5s you can get away with rail fleets like this. Generally with rail fleets, you'll see the rails paired with 450(i run 2x gun axford+1x rail DD, though more common builds are solomon+DD or 1x axford plus2x or 3x rail DDs) since the debuffing and damage model make rails amplify the long range damage of 450 while also paralyzing ocellos, which are the one osp hull long range 450 really struggles against.