I always try to do what you suggested for 100% voting strategy. I search for new content to upvote while my daily power recharges back to max, and then I cast my next vote.

Steemrewarding.com even has a form I can use to time my votes on multiple posts I pre-select, so that it does not fire my next vote until my power has finished charging to max. That way I can go to sleep or to work, and know that my account is still actively earning rewards through curation.

Honestly, I tend to curate posts that are not receiving enough deserved reward payment. If the post is less than 5 minutes old, I wait, or save it for later. I do not try to time my votes on specific authors to win a big curation vote before their trail of curators kick in.

Sometimes I fire off two or more 100% votes in a row without waiting for my power to recharge. Only if I know I am going to be busy and I know I have nothing queued up.