I race at DLV as well and am very experienced at getting lapped. If I think I can get back on with the group and I'm just one lap down, I will move up track when there's a safe opportunity, and then use the banking to help myself get on the back of the group. Otherwise in my experience it's very difficult to merge back into the group from the pole lane. More than 1 lap down, I just stay in the pole lane, and probably quit the race soon.