Their temperament is much like channa gachua. They will probably be relatively aggressive to one another but if the aquarium is decorated properly so that they have enough space to escape one another, they should coexist adequately; especially in an 8 foot tank.
With 10 individuals though, you'll have to expect pairing and likely breeding. In which case there is a very high chance the pair will start killing off the others if they can. As with most channa, i would recommend a group of 5-6 and then letting them form a pair, ultimately keeping a pair in a tank dedicated to them alone.