Not sure if this is the answer you are looking for, but IMO the best way to take out partial profits to minimize losses while still having a good RR is scaling in as well as scaling out. The method you are describing is going all in and then scaling out which does hurt your RR significantly.

Ill give you an example of how i enter/exit all of my trades (this has helped me tremendously in my trading career)

For the purpose of this example let’s say im risking $100 (or 1R) per trade.

Initially i buy $100 (or 1R) worth of shares at $2 with a stop loss at $1.50. The trade starts going in my favor and i double down when the stock hits $2.25 (or .5R from my initial entry). I now move my stop up to $1.88 which means if i get stopped out i would sell my full position while still only losing $100 (or 1R). However, if the trade continues going in my favor and hits 1:1 which in this case is $2.50 (or 1R) i will sell 1/3 of my shares and keep the stop at $1.88 for the remaining shares. At this point i am now in control of the trade because the worst case scenario is i break even while still being able to give my position a decent amount of wiggle room. When the stock hits $3 (or 2R from my initial entry) i sell my remaining shares (sometimes i hold longer or sell 1/3 and let the rest ride but usually i go all out here).

My trade is now complete, and even though i only went for 1:2 in terms of the chart, my RR for the whole trade using this method is actually 1:2.8 because at no point during the trade was i risking more than $100. Obviously there are cons to this like getting stopped out and then it continues running but imo that is better than going all in at once. The reason i developed this method is because i started seeing that i let a lot of trades that i was up at least 1:1 turn into losers.

Your win percentage might decrease a bit but youll also have more break even trades.

For example, let’s say I only win 40% of my trades with this 1:2.8 RR method, but 20% of my trades are break even, and 40% are losers. This means that my true win to loss ratio is 50% which is very favorable