I have a hard time imagining an optimized playthrough picking Lust/Purity early like that, or at least mine couldn't support that route. The reward for doing so is far too small compared to how good Orc Diversification is in wiping out the Tak'kan vote. I remember some people suggested Base Defense for that slate in the past, but with the clarity of hindsight it seems that skipping that research entirely is the more likely outcome there.
Ginasta RP is definitely pretty tightly routed to hit that 60 RP check at the end of the Incubus War Aftermath. I balked at the Beautification investment when I was originally planning my route since I didn't think it would be that important, but it turns out it's pretty valuable. My route could do it without I think, if you refused the Lord of Blood's Succubi's offer, but that's a bit suboptimal for other reasons (not so much so that you outright couldn't do it though).