By Tom Bowles Our daily fantasy (DFS) NASCAR expert gives the best lineup picks for DraftKings success for the FireKeepers Casino 400 at Michigan International Speedway’s two-mile oval. NASCAR Cup Series drivers may not find a leprechaun, but they’ll strive to visit victory lane at Michigan International Speedway this weekend. Let Joy Tomlinson of Frontstretch.com prep your daily fantasy NASCAR DraftKings rosters for the FireKeepers Casino 400 (Sunday, Aug. 7 at 3 p.m. ET on USA Network). The 2-mile racetrack sits in the Irish Hills area of Michigan and has produced some fairly good racing in …