Go read my
Tyranid Primer You have a lot of design issues that I talk about in there.
Wargear: Adrenal Glands (I and WS), Enhanced Senses, Extended Carapace, Toxin Sacs, Venom Cannon, Venom Cannon, Toxic Miasma
Your Tyrant is not only expensive and ineffective, but also illegal.
You may not take a biomorph more than once. You may choose adrenal glands, but must select either +I OR +WS.
Additionally, focus on the task you want your tyrant to perform; Assault? Vehicle suppression? infantry killer? Venom cannons are currently decent at vehicle suppression and can be murder on open-topped vehicles. Barbed stranglers do ok, and can be good at blasting light and medium infantry, as well as light vehicles. Deathspitter is a little expensive, and isn't too bad at medium vehicles.
Without wings, it's not really a good idea to give him scythe talons as it will be difficult to catch units that are a good match for him, so perhaps a venom cannon/devourer or VC/Deathspitter or VC/Barbed Strangler. Remove the assault upgrades, and consider attaching at least one tyrant guard to the unit. By doing this, you're making a solid backfield synapse node for whatever gaunts you eventually settle on.
Most people who field warriors go one of two routes: deathspitter spam or assault. Your overall army looks to be a little light on the assault front, so perhaps you should actually focus on Shooty Bugs from Hell.
3 lictors are an excellent addition, but I can see from your list that you're not really prepared to use them to their greatest advantage. You only have 2 assault broods and a godfex.
Go read the Primer. It will help you rethink your list.