Cross class abilities for NIN?

[TribalReturns]

This will be my main class so i was wondering, are there any cross class abilities that are a must have for NIN?

[Darkstride]

This will be my main class so i was wondering, are there any cross class abilities that are a must have for NIN?

Internal Release - why pass up extra Crit?

Invigorate - you'll want the extra TP

Blood for Blood - more damage!

[Frizze]

I dont play a ninja, but when i saw the question i looked up their cross class skills. Those were the 3 that immediately jumped out at me as super useful. More crit is more damage(though if i read it right, you already have this by the time you qualify as a ninja), damage being one of the reasons we play DPS classes. Any ability to get back TP on a class that runs through it is a good thing. And as someone who shouldnt be being hit too often anyway, the downside to B4B looks minimal compared to the upside(percentage damage boost!).

[Lethallin]

Blood for Blood and Invigorate from Lancer.
Internal release from Pugilist.

These are practically non-negotiable.

The other two don't matter a whole lot, you'll probably be best off with Mantra and Second Wind from PUG, but make sure to get the first three.

[Tachyon]

B4B - yes
Internal Release - more crit is always good
Invigorate - *gobbles up TP*
Second Wind - An extra heal when you need it

Last slot doesn't really matter to me