Help stocking my tank.

**I posted this in the aro section but wanted the help of the datnoid guys too**

Hey guys! I haven't been back on this forums since my 30" black aro jumped out of my tank. We'll I've decided to start again and have recently set up my 75g as a temporary tank.

The fish I'm interested in are: An arowana, a ray, and datnoids.

Not sure if this is the right section to post this question but I was wondering if this combo would work out okay: jardini, a ray or two (motoro or leopoldi), and a datnoid or two.

I know jardinis can get aggressive but I planned on adding the jardini last in an effort to maybe prevent too much aggression. I don't want to get a silver or a black again because I feel they get too big and a tank smaller than 400g would be torturing them.

I also know that NGT Datnoids are also very aggressve, especially to each other, but how are they to other fish?

Will the rays be alright?

My previous set up was: a black arowana, a reticulated ray, a hystrix ray, a TSN, and a red tailed cat. So I have some experience with these fish, but after my black aro died the tanks just went downhill.

I planned on stocking them in this order:
1-two NGTs first (since I heard they grow the slowest and there are two for sale at my LFS)
2-a ray or two
3- jardini

Suggestions? comments? Thanks in advance for any help you guys might be able to give me!

Yeah, I just did some more reading and seems like if I want multiple dat's I should go with four or more?

The tank was a 120g, they weren't that big yet and planned on getting a bigger tank till stuff started going down hill.

As with this set up. I plan on gettin a tank of atleast 300g within the next two years.

Thanks for the replies! My aro seemed fine but yeah, I don't plan on getting another S.A. aro as they get too big too fast.

Anyways, thanks again for the replies. So a single NGT should be fine with the rays and jardini?