Xenoblade CX TP Gain XX and more.

I've been grinding for materials to make three of these things, I know a few locations, anyone have any info or a map picture of more locations for the creatures that drop the materials? Also, I have mastered Duelist Full Metal Jaguar and Galactic Knight because mainly to mix weapons and skills, But why are they popular?

@blazingsonic: There is this search engine for XCX:

http://birdonwheels5.no-ip.org/xenoblade/augment_search.php?search_term=Arts:+Gain+TP+XX

And personally, I use this spread sheet:

https://docs.google.com/spreadsheets/d/1g0YR4M8RAHiRhCbAvV4tjXXHLEhRMrARzZMYAUGmyZ4/htmlview?sle=true#

And this database:

https://www.joejiko.com/g/xbx/db

For example, here is a material list:

https://www.joejiko.com/g/xbx/db/materials

As to why people use those two classes, this is only a guess:

Galactic Knight: Star Wars Episode 7 just came out, and this is basically a Jedi class. It's always fun to stack melee combos. You can do some crazy beam damage with arts from this class too.

Duelist/Full Metal Jaguar: I personally haven't done these classes, but a friend of mine did. He said he liked it due to arts having fast cool downs, so you could do a lot of fun art combos consistently.