Well if you don't want to do them manually (which isn't a bad thing at all) then Ultimate Demon is pretty much the way to go. You can also take a look at Lincorn AIO (search on BHW) but it basically looks and feels like UD, never used it personally but I've been reading positive reviews about it.
As for GSA, it's much better at doing Tier 2 and up links but you can use that as well if you really want.