I have a model, for which the standard solution strategy of the Gurobi solver works pretty fine (may be the best choice at all). But for some instances it helps a lot to focus on improving the bound (MIPFOCUS=3) at least for a short time in the beginning.
So I found these nice parameters ImproveStartGap, ImproveStartNodes, ImproveStartTime quite interesting, because they allow to focus on improving the bound for some time in the beginning and then switch to another strategy. Unfortunately, the strategy to which they switch involves lots of heuristics (seems similar to switching from MIPFOCUS=3 to MIPFOCUS=1).
I wonder if it is possible to choose another strategy to switch to after the conditions of ImproveStartGap, ImproveStartNodes, ImproveStartTime are fulfiled? I personaly would like to switch to the "default" solution strategy (not to Heuristics=0.5 RINS=10).
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