XL245 to give enough speed to get to the sniping positions - you need the long range ability to hit with SC2, or forget this mech. 2xLRM10 give nice hurting power and the AC2s heep harassment levels high. ERL caused real heat problems, which drove the shift to LL. Will be trying 2xLRM5 with ERL as a heat management strategy. Good damage at long range and ability to handle a few lights if they make it up close. Good all around mech - just not great at any one thing.
Not enough LRM ammo. Adding BAP is also good. Try to keep 1 JJ! My version drops 1 AC2. Oh, please change your title to: QKD-IV4 "Ranger Danger" (2x LRM10, 1x LLas, 2x AC2, XL245)