Yeah, plunging the skillshot is great if you have a good pop award lined up (if you're on-site and it's giving you a special, take that!)
With regards to modes and stacking, getting Lannister lit is probably one of the best things to have. 40 second timer with saved progress, and it rewards you for bricked shots so it will make those Stark/Martell misses easier to take. Multiball stacking is also big, with Stark being my go-to for Blackwater because of the grace period on the ball save. Lannister/Greyjoy is a great multiball pair, and pesky modes like Targaryen-Drogon and Tyrell are easier to pick off.
If you're looking for easy points Stark (see above) is great, and Barratheon rewards good Wall Multiball play with 50-100m+ supers. Our local 5-ball high score of 5.6b was set using Barratheon and no major Iron Throne scoring. 25x supers are juicy.