What characters should I use in a Padme Team/QGJ omicron team/JKR team

You may add R2 (relatively good choice) and one of clones (not good but doesn't seem you have viable 5th choice anyway). Also you may want to move GMY under Padme on occasion and give, say, Old Ben to JKR (or undersize with JKR-Basty-Jolee-smth if needed). It will surely hurt offensive capabilities of JKR squad but it may be still viable, purely depends on your opponent.