RE: Balancer for multiple brands?
Since the Lipo industry doesn't want to settle for a standard balancer plug, your only real option will be to make (or buy) adapter cables to go from your balancer to whatever battery you are charging.
[opinion] I think the Lipo manufacturers still think they can force you to buy their brand batteries and chargers and esc's and whatever else, forever, once you commit to their style of connector. If so, that's incredibly lame and short-sighted. [/opinion]