I went through Nightingale Grove yesterday, in RTwP, practically with no damage taken, because I could quickly switch focus from one enemy to another with hasted characters.
Come to think of it, maybe the difference is just in whether you can focus fire or not and/or whether focus fire is useful in context or not. TB tends to get you thinking tactically about dealing with things in a spread - two attacking one mob here, a bit of cc over there, etc. Whereas with RTwP the tendency is to go all in on one mob at a time.
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Nenio, who was pretty useless for the earlier part of the game, is starting to really come into her own now as a CC queen, now that she's got a bunch of feats under her belt. Doubled Fey bloodlined (normal+mythic, from a single crossblooded sorc dip), heightened/persistent metamagicked Hideous Laughter (with the pen+school feats) is no joke for even tough bossy mobs. If it's got a mind, that mind is her bitch. Going to take the "best joke" or whatever it is mythical feat too - that should be a riot (makes hideous laughter shift to other mobs if it fails DC on one, and keeps going, apparently).
I'm starting to settle on an A-team of a custom supertank/dazzling display halfling sellsword (50AC when buffed up), Regill, me (Eldritch Scion lightning based, aiming for Azata zippy-magicked Chain lightning), Seelah as a skald boosting the tank, reg and herself, all of us with Outflank, plus Sosiel and a trippy dog, and Nenio.
I've always loved Eldritch Scion/Knight because it can be handy at both melee and blasting magic, but boy does it take some time to really come online. It only really gets into a proper groove by about lvl 8/9.
I soooo love Regill's comments, and his voice actor is really top drawer. Such a sensible curmudgeon