Investment: Rugani & Fernandez
Reasoning: Yesterday, there was a leak that we will be getting a guaranteed TOTW SBC. The requirements for this would likely be an 83 rated squad.
While many 83s have already risen, most 82s have not, notably two of the SBC gems: Rugani & Fernandez (often pop in cheapest solutions for 83 rated SBCs).
If you want to accelerate the process when the SBC drops, try and make cheapest solutions on FUTBIN that incorporate these two.
Target SELL: When you are happy with the profit and/or see a better investment opportunity.