I respect that you want to get better but I personally don't believe in technical regimens of any sort. I think you can learn all you need from actual pieces of music or perhaps etudes. I would recommend finding a set of etudes you like that are at your level rather than doing boring exercises. I want to work on (have only barely started mind you) etudes by Chopin and then one day those of Scriabin and Liszt but those are all very hard. I think Burgmuller wrote a set that might be more or less at your level.