FBlit and FText use the Amiga Blitter to speed up graphics and text operations, respectively. They're both free on Aminet and are pretty much "must-have" utilities, especially for non-accelerated (<68030) or non-graphics card users.
The BetterWB page doesn't specifically mention if it adds them (
http://lilliput.amiga-projects.net/BetterWB.htm ) but again, for any non-graphics card system in particular, I would.
Not sure what "Amiga Blitter" setting in PPaint does, but if I ever see the option for using the Blitter, I'd turn it on (unless after doing so, you notice it causes problems, of course).
