I use steemauto for curation and for a few people who I have built relationships with and whom I don't want to miss voting because I deem their content to be always worthy of a vote. This can and has changed and if that happens my auto vote changes accordingly. At eh same time I use steemify for the same people so that I am able to make sure to comment and let them know that I am still reading their great work.
That is a good way to use it, but I just prefer to give the vote myself. It just feels more genuine for me to do the vote at the time of replying. I know my curation probably isn't maximised, but I don't earn that much in curation anyway so I am not too worried.