Some suggestions I could take from my tanking season:
- Decide to do tanking or not from the beginning, otherwise it could be difficult to retain the level if many other teams are tanking
- If you wish to win cup/SL/CL play some friendlies to improve your main team form (it seems blue packs are not enough; if your team enters a nightmare form they need to exit from it playing games)
- Reserves tanking could get very tired if they are out of position; try to play with low pressing and area marking to keep it high