Innerspace handles all of this for me. When I build a new team I set it up in ISBoxer first - usually by copying and pasting a current Character Set. There is a bug where it doesn't take the Window Swapping keys so I add those in manually.

I have Key Maps that do all my Repeater Functions and General Keymaps that have things like my Group Invite, Group Leave, AcceptTrade/BG/Random Dungeon, Leave BG/Random Dungeon, Drink Water, Mount etc.

Then my action bars, unit frames, and most other mods have profiles. I have customized the default profile for all of these mods so whenever I make a new character there is extremely minimal setup I need to do to slot in a different character or start a whole new team.

If I need to fix up any macros I edit them in ISBoxer then hit my reloadui -> all keybinding (G1 on my logitech) and bam away I go.

cant stress how powerful innerspace is, combined with jamba its pretty incredible. I used to 5x hardware box and it was nothing on the flexibility and power I have availible now.