Selling slices is good, but picking exact prices is tricky. Fees can add up too. Consider a trailing stop-loss or tiered sell orders to automate some profit-taking. Don't forget taxes, volatility, and your ultimate goal - that house! DCA back in during the bear market, but plan to put some regular income towards the house too. Adapt as needed, and good luck!
Good trade management will result in calm trading patterns. But, it is true that we also have to make a balance as you said, it does seem simple when we look at it, but if it is not calculated carefully, it has a slight uncomfortable effect in the end.
For the pattern, the OP above is good, just sharpen it by looking at where the market trend will lead and for the current market situation, it feels quite appropriate if you really want to collect more BTC back.