This is what I came up with:
The Tartaros Pattern Terminator armour have mostly been issued to veterans of the first company and higher-ranking officers. The Tartaros Pattern Terminator armour follows the same rules as the normal Indomitus pattern Terminator Armor, apart from the following exceptions:
A Tartaros Pattern Terminator cannot Run, and the wearer suffers -10 to Agility, and cannot Dodge (but may still Parry).
Weapon mounting remains the same as Indomitus pattern Terminator Armor.
Since this suit is a holy relic from the days of the Great Crusade, it may not be purchased or requested; these precious suits of armor may only be bequeathed at the Watch Captain's option and the Battle-Brother must then spend a minimum of 40 Requisition Points to arm it. Its weapons must come from the Terminator Compatible Weapons list on page 164 of the Deathwatch Core Rulebook and from any Terminator Compatible Weapons list in future Deathwatch supplements.
The Tartaros pattern Terminator armor features a high collar, or gorget, that gives enhanced protection to the neck and head. Every time an attack hits the wearer's head, roll a d10. On a result of 8, 9 or 10, the attack counts as hitting the body instead.
A Space Marine who wears an ancient suit of Tartaros Pattern Terminator armour commands the respect of his Battle-Brothers. The wearer gains a +15 Fellowship bonus in any dealings with other Space Marines.
Name Locations Covered AP Kg Req Renown
Tartaros Pattern Terminator Armor All 14 350 Special Famed
Let me know what you think.