Perry,
I'm glad you are hooking on cast bullets, doesn't take long for the lead to get into your veins hey?
These thoughts are just my own opinion, so you can make of them what you will.

Lee Liquid Alox - is OK for cast bullets around the 1200 or below fps mark, much over that and I've had leading problems. A really good idea though. I use it in my Bore gun and with round ball loads, as it's about the only way to lube them.

I used to make my own lube whan we were commercially making cast handgun bullets for shooters, I remember we added a tube of STP friction proofing to each batch of lube, seemed to work well, we also used a particular grade of Shell grease, but I can't recall the name at the moment, will have to look it up. Most of our customers said it worked well for them.

I'm (sort of) a fan of the faster handgun powders for cast bullets, depends on the calibres and what results you are after. Most of the time, cast bullets to me are a lighter practice load around the 1500-1600 fps mark, and pistol powders can do that pretty well.
I've never used fillers in any calibre, and never will in the calibres I currently shoot. This is not to say they have their place in the big NE cartridges, as they most likely do. For me they haven't been needed.
I've never paper patched anything, but some recent posts here have had me wanting to give them a try.

Many other more experienced casters on here can also offer their suggestions on that.

Regards,
David.