Not sure you are optimizing the existing talent by leaving Hoskins in the outfield and signing an OK free agent to play 1B.
My strategy is not that far off:
Sign one of the better free agent pitchers from the group of Darvish, Tanaka, Lynn, Arrietta, Cobb, and Otani. Cobb would be the fallback here. Ideally sign someone better.
Second deal Hernandez for a second starting pitcher. Rupp is trade bait also.
Third, sign at least one more credible back of the bullpen pitcher.
Fourth, sign a left-handed 1B/3B type
C - Alfaro/Knapp
IF - Hoskins, Kingery, Crawford, Franco. Keep Galvis to play some 2B early in the year, maybe 3B later.
OF - Williams, Herrera, Altherr. Hopefully Quinn as 4th OF
Starters - Nola, FA, Trade Acquisition, 2 from list of Eickhoff, Pivetta, Eflin, Thompson
Relief - Neris, FA, Garcia, Morgan, 3 others from current bullpen or AAA or FA
In terms of payroll this adds $25 million for a starter, maybe $8-$10 million for the bullpen type, $5 million for the backup 3B, $10-$15 million for the starter we trade for. Maybe another $10-$15 million for bullpen or reserve acquisitions. Payroll still in the $100-$120 million range max.
Lineup eventually of Kingery, Crawford, Herrera, Hoskins, Williams, Altherr, Franco/LH 3B, Alfaro/Knapp.