I'd have to say that this is a nice visual guide for beginners.
My opinions on certain skills:
Phoenix strike- a VERY good map clearer (especially for those speed runs), and it curves throughout the whole map. (Yes, it curves along edges) I personally got this over Aero Tornado, in which I just use the XX loop/Gungnir/other skills for damage.
Entangle- As you have mentioned, this is 95% PvP oriented. However, it is useful in Altera's secret dungeon against the Type-H boss. By predicting its path, you can place down a trap, freeze him, then proceed to skill chain with your party to deal major damage on him.
Aero Strafe- This is a skill made for pure damage against mobs. However, this skill has tremendous multipliers in PvP, giving Grand Archers a nice skill in their arsenal to make up for lower DPS than other classes whether or not they have decent equipment.
Vibration Shot- In my opinion, one of the best passives. It gives you a lot more DPS with your arrow combos, which you will use constantly in dungeons.
"My power shall become a shining beacon, that will bestow healing upon your broken wings."- Frederick Chopin, Eternal Sonata.