In all honesty, curation is the best way to make use of that 500k HP, regardless if it's delegated, invested, or leased. Given that 50/50 sharing of posts' rewards makes it more convenient and "profitable" to curate manually or automatically via curation guilds like curie, curangel, ocd and many more promising one than adding the burden to yourself of posting daily with one self-vote. Optimal usage is still best at not less than 80℅ of VP and I prefer it distributed to 3-5 niche communities.