Okay here goes.
Commander Shas'El and 2 shield drones
-Plasma rifle-
-CIB
-TA,
-HWDC
-HWMT = 130 points
(for taking out heavy and light infantry) don't know if i should get rid of the Tageting array and add a fusion blaster for tanks.
The Ionknife(known to some as Sentinel) is an excellent commander setup, as the CIB benefits from the commanders high BS. But this guy should proably be sent after TEQs (Terminator equivalents. Anything with a +2 Armour save.) Also, I'd ditch the Shield Drones and save yourself 30 points, but that's a matter or taste, personally.
3 XV8 crisis Suits, 1 is TL]
-Missile pod
-Plasma Rifle
-HWMT
-Bonding Kinfe
196 points
(Taking out infantry and light-medium tanks)
These suits are actually illegal. You have to fill the third hardpoint on a suit. Also you've taken The nearly industry standard Fireknife Configuration. it's a generalist, it excells at nothing. now, because you've expressed issues with Transports, I'm going to suggest a team of Deathrain-4 XV8s: Twin Linked Missile pods with Targetting array. This essentially means that you've got Rerolling to hit, BS4 missile shots. Some call it overkill, some call it reliability. I like them, personally. A single suit costs 53, while a single Fireknife costs about 62 points. So you're saving another thirty points by taking a more efficient elites choice.
Hammerhead
-railgun
-SMS
-Disruption pod
-Seeker Missile
175 points
taking heavy tanks and infantry)
I can't see any problems with this guy, a good, rather standard setup. Although, I have issues with the seeker missile, which I'll address with your pathfinders.
[2 broadsides 1 is LD]
-TL Railgun
-SMS
-ASS
-Bonding knife
-Target lock
175 points
(mostly for tanks or heavy infantry)
Drop the target lock, team leader and knife, and field them as two separate units. Saves you 15 points.
[6 XV25 stealth suits w/ LD] Bonding knife,TA = 250 points
(Death squad which I am Deep Striking)
Drop the Targeting Array, with 18 S5 AP5 shots, you just don't need it. Also, it would require the other five members of the Stealth team to take support systems, and the Targeting Array can't be taken Hard-Wired.
4x Pathfinders With Devilfish
Devilfish:
-Burst Cannon
-Gun drones
-Disruptions pod
-Seeker missle
143 points
Okay, with Pathfinders BS being what it is, you're gonna be hitting an average of two Markerlight hits per turn. What with two seekers and Fire warriors to support, frankly I don't think you have another Pathfinders. Remeber, if you've followed my suggestions(You don't, by any means have to, they're just suggestions), you have some 75~ points you could buy a few more pathfinders with. More points that that if you decided to drop the seeker.
[12 Kroot] = 84 points
(suicide killers)
Keep in mind, these guys aren't bad off a charge, and that they have the infiltrate special rule. This means that they can use the Outflank rule, which means that if it's placed in reserve, it can come in off the side of the table whenever you want, and hopefully capture or contest an objective lategame.
[2x 10 fire warriors and 2 marker drones w/ Shas'Ui] bonding knife , HWDC = 350
(marker drones to help BS. nothing is better then 2 and up hits. and helps other group and seeker misses.
Okay, Markerlights on Firewarriors is a bad idea. I actually considered it myself, but I decided against it. Why? Because if the Firewarriors move at all, the drones can't fire their lights. What I'd suggest is that you move the Markerdrones to either your commander or XV8 Team, or maybe even your Stealthsuit team, where their 'Type:as owner' Will grant them Relentless, and thus the ability to fire on the move. If you really want markerlights in your Firewarrior teams, don't go drones, give the Shas'Ui a markerlight for 5 points less.
It also seems to me, that you're light of Firewarriors for 1500 points. I'd probably consider buy another squad.
Your total list came in at 1503 points.