I agree to not worry too much about the numbers on soapcalc (I was only skimming replies, but I think this was mentioned).
I make a soap that only scores about a 17, I think, (edited to add: I checked my recipe on soapcalc, and the Bubbly is actually listed at 15!) which is way lower than I would want, but when I make it, it has huge fluffy bubbles, it lathers instantly when you rub it in your hands under the water, and has an incredibly fluffy lather.
The only oil I use for bubbles is coconut oil and only at 15%. I also add 5% castor. That's it. And the lather is INCREDIBLE.
(I have never bothered with sugar or sodium lactate or anything like that, either. Just play around a bit - you might be surprised!)