In hard mode in the Vault of Glass raid in Destiny once a player dies he cannot be revived until the next checkpoint. If a guardian dies soon after a checkpoint it might be a good idea to restart from that ckeckpoint by each guardian killing themselves.
Beating Raise the Spire on Hard Mode Vault of Glass
This part is very similar to the normal mode part. You can find a guide for it here: http://wp.me/p1SfP0-1Nf
Beating The Templar on Hard Mode Vault of Glass Destiny
To beat this part leave two guardians with a sniper rifle on the platform where you respawn. They are in a very safe position and can give support to wherever it is needed. Put on guardian in the back middle, one guardian on the right and two guardians on the left side.
The most important point is that oracles are top priorities. On hard mode the oracles take a lot of damage so having two players take care of each oracle is a good idea. Also try to have players that can cover more than one oracle.
When the templar summons his legions get all guardians including the two snipers to jump on the platform to the left side. There is some good cover there. Be sure to use your heavy ammo on the more difficult enemies, for example the Minotaurs.For the remaining Confluxes Leave 2 on the left and right side and one each in the back left and right. When legions are summoned again go back up to the platform. You can find tips that are still relevant from the normal mode here: http://wp.me/p1SfP0-1Nh
Beating the Gorgon’s Maze on Hard Mode Vault of Glass Destiny
The strategy for Gorgon’s Maze is the same as normal mode. You can find a guide for it here: http://wp.me/p1SfP0-1Nm
Beating The Gate on Hard Mode Vault of Glass Destiny
Use the same strategy to clear the gates in the Vault of Glass in Destiny as the normal mode in this part. Sending in a Warlock with self resurrect can make this part a lot easier. The normal mode guide can be found here: http://wp.me/p1SfP0-1Nq
Beating Atheon, Time’s Conflux on Hard Mode Vault of Glass Destiny
The strategy to beat Atheon, Time’s Conflux on hard mode in the Vault of Glass in Destiny is very similar to the normal mode. A guide for the normal mode can be found here: http://wp.me/p1SfP0-1Ns
The main difference is that the oracles inside the portals take a lot longer to take out. Once the three guardians outside the portal have finished killing the minions that spawn send one of them through the gate to help the team clear the Minotaurs and the oracles more quickly.