GL's are the way to go, even making oddball teams with them to get a jump on the opponents. Going first can change the whole battle. Your JMK, GK, CAT +2 team can clear about any node through sector 5. That is my go to clean up team if I don't three star a node. Datadisks also make a big difference. You can run a JML team with Yoda, Shaak, +2 with zealous ambition disks and the support units will hit for big damage. Entreanched and Fortified disks are also big helps. At this point, the teams you see on regular nodes in hard mode aren't that diverse so you learn which teams to use. Enemies are generally: Anakin w/ 501st, Padme, GK and Yoda led Jedi, GG teams (with and without Wat), Inquisitors, Ewoks, Geos, Tuskens, Jawas, JTR lead resistance, Imp Troopers, Thrawn or Palp lead Empire, DR lead Sith Empire, BH's, NS's, OR + Nest, Clones, MM lead rebel fighters, Phoenix, Bo Katarn or Maul lead Mandos, Hux lead FO, and Dooku lead Seps. You will see lots of repeats.