I like using phase-based libs, because I like the live performances. I always try not to use the obvious stuff, because I don't want to use someone else's melodies or ideas, bit I think this is not difficult if you are not lazy
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I use Minimal from Sonokinetic mostly for orchestral backgrounds, it works great and sounds nice. And I love to use NI's Action Strings for the live feel of their basic rhythms, for example the 16th repetitions with accents, not recognizable in a complex arrangement, but it adds power and realism to my mix. Themes like Alien Attack are very useful to me as well, because they are not too dominant, they just add live feel. There is a Tutorial on Youtube which shows how good this can sound and how individually you can work with the Lib, however most composers seem to just chose a melodic theme like "Last heroes" and press one single note for 8 bars :D
I use Action Strikes all the time, it is fantastic to get a big huge epic feeling and the percussion sounds really great! Most important, I can combine the loops with single hits and single articulations, so I'm not feeling limited in any way.
The Orchestra from Sonuscore was mentioned, this one for me is not really a phrase based lib, as it contains all instruments as single nkis. The phrases/arrangements are helpful to sketch, but not the most important thing for me. I love the mixed colors, I use them in the same way as I used Symphobia patches before. For action music, I often start the track using TO's basic string rhythms: it is a whole grooving string ensemble that I can easily play with my right hand and it is working great for me! I can easily get a quick sketch and later I polish and adjust things, I love working like this
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