There is a command called: setstakesplitthreshold=xxx
I think it should work here too. Type that into console and set it to 200. Then it will stop splitting your stakes when the pile would go below 200.
I tried and that command does not seem to work with this wallet.

I was wondering how to stop the splitting. Real pain in hinney to keep recombining the split stakes.
The new diamond wallet does not split my stakes, pretty much the same wallet. Recombining stakes
loses accumulated block time. Plus adds a lot more transactions, than is necessary. Maybe Dishwara
has the answer?
Peace, Dennis