Not even close to being unbeatable. It's terrible.
HQ: Space Marine Librarian + Terminator armour with a storm shield
+ Psychic powers: Null zone and Smite = 140pts
Smite equals Machine Curse in being the worst psychic power in the codex. Gate or Avenger are much better.
Troops: Tactical Squad + 5 Space Marines
+ Plasma Cannon = 175pts
Tactical Squad + 5 Space Marines
+ Plasma Cannon = 175pts
Scout Squad + Sergeant Telion = 125pts
Terrible. How do you intend on taking objectives on your opponents side of the board without transports? Why don't your tactical sqauds have special weapons? Why are you taking Plasma Cannons instead of Missile Launchers when you clearly have no long range anti-tank anywhere in the list?
Your Tactical marines NEED Rhinos or Razorbacks.
Elites: Assault Terminator Squad + Land Raider Redeemer + Multi-Melta
+ Bother-Sergeant Chronus = 520pts
First of all, you're much better off taking a Crusader instead of the Redeemer. Secondly, what is Chronus doing here? You need to actually think about these things. You certainly don't need the extra
BS with all those twin-linked weapons; and Extra Armour and
POTMS take care of the rest.
Fast Attack: Land Speeder Storm = 50 pts
Nice one. You could have gone with a regular Land Speeder that does the exact same thing, but instead you chose the open topped version with worse
BS. Unless you plan on using it as a mini 'gunboat' for the Scouts...which is a horrible idea, considering that you can't actually move the Land Speeder without rending the contents useless.
Land Speeder + Multi-Melta
+ Assault Cannon = 100pts
Again horrible. The Assault Cannon is terrible, it's overcosted and forces you to operate far too close to your opponent. The Typhoon Missile Launcher is better in every way. Get rid of the Multi-Melta.
Heavy Support: Vindicator = 115pts
Predator + Heavy bolters
+ Extra armour = 100pts
Extra Armour on a shooting tank? Fail.
Unbeatable?
Not even close to being unbeatable. Let's go over what your list is lacking:
- Long range anti-tank. Your long range shooting consists of 2 Plasma cannons and one autocannon. And no, snipers don't count. That's not even close to being good enough; even a half decent Dark Eldar or Imperial Guard player will kite you all day.
- Short range anti-tank. You have one Meltagun in the entire list...how do you intend on taking down Av13/14?
The only scary part of the list is the Terminator deathstar...and that will stop working once you start playing decent players who actually know how to handle it.