Meh, artemis is wasted with LRM5's, which have a tight grouping to start with. Further, with 6xLRM5's, Artemis is costing you 6 tons and 6 slots. Those 30 LRM racks, with 2 15's would weigh less and take less space, maintaining a tight group.
Or, to keep with a fairly similar build, but more of everything:
CPLT-A1 2 Artemis LRM20's (20 artemis guided missiles instead of 30!), 12 DHS (one less), 1620 ammo (less than you had, but seriously 1800 ammo for 30 tubes is grossly excessive), and an XL255 engine allowing you to get into position and to support when harassed at a reasonable speed and an extra jump jet for better repositioning.
If it were me, though, I'd do this:
CPLT-A1 2 ARLM15's, matching your 30 tubes; supported by 4 SSRM2 launchers for self defense vs. those pesky lights. Keeping with the XL255 maintains sufficient maneuverability to let you easily take on any light one on one and splatter him all over the terrain. Not a lot of SSRM ammo, but enough for your needs - you're only using the SSRM's when necessary after all, either for self defense or if you should actually happen to run out of LRM ammo. Still with 2 jump jets for better jumping: Get high, rain guided missiles down on people.