Welcome to Librarium Online!
Hey new user here this is my first post, got back into 40k recently and I'm revising some of my old lists.
I know some people don't like tailored lists but here it is anyway:
Shas'el (Fireknife) 97pts
2 squads of 6 Fire Warriors 120pts
2 squads of 5 Pathfinders 140pts
1 Rail-Rifle in each squad
2 Devilfish 190pts
Each with multi and Disruption Pod
2 squads of 10 Kroot 140pts
Hammerhead (Railhead) 170pts
Hammerhead (Ionhead) 135pts
2 squads of 3 Crisis Suits (FireKnife) 372pts
All with Plasma-MPod-Multi
Crisis Suit (DeathRain) 53pts
Total: 1497 Points
Kind of annoyed at falling 3pts short of max, but I can't fit anything else in there.
Unfortunately I have no Pirahnas, but it seems like a pretty safe and effective list to me.
Awaiting your advice/critisism, let me know if you want the layout changed.
Drop the rail rifles from the pathfinders and just run two units of 4. Personally I don't like the ionhead. Just doesn't have enough firepower compared to the railgun. You need shield drones with the broadside, play a few games without and you will understand.