I own a few LEE molds. The 6 cavity are decent. The biggest plus is the anodized sprue plate, something you wouldn't expect on a budget mold.
Some people just take them out of the box and cast away. I clean my new mold and then give it a good going over and lube. I sparingly lube all the pivot points and wear surfaces with a small film of 2-stroke motor oil. I picked Polaris Blue because I have it kicking around. 2-stroke oil is slower to gas than other oils and it sticks to hot metal. I try and keep any hint of the oil away from the cavities. After a 10# pot of lead, I'll apply oil again, a slight film with a Q-Tip.
I usually give the top of the mold a bit of a convex and re-polish it.
You can get some real decent production out of the 6 cavity, even on a bad pour, you'll still get 4 good bullets. I keep the temp a bit under 700, and keep the casting rate slow enough to avoid any frosty bullets.
I weigh my bullets, cull any light ones. Light ones will have inclusions or flaws. I still lube old school, with a 4500, and if the bullet looks a bit odd after lubing, I cull those as well. Even being a bit OCD, I still end up with over 70% good bullets.
The 2 cavity LEE molds are a frustrating tool, the sprue plate is never smooth, and never flat. I've lapped them and heat treated them, and they work a bit better, most of the time. A Lyman 2 cavity mold is far superior.
A couple of designs that work well for me are:
LEE 358-148-WC
LEE 452-255-RF
LEE 429-200-RF (only for 44-40, 429 is too small for most 44 Mags)
It was fairly easy to get accuracy with no leading with any of these. I usually "smoke" the cavities with a Bic when the mold is new, and sporadically "smoke" them after the first session.
Nitro