Best grenade for room clearing?, Help me choose! Options

[FuelDrop]

I'm looking for the best lethal and non-lethal grenades to clear a room, SWAT style. Default plan:

1)Breach door with shotgun loaded with shock-lock rounds blowing out lock.
2)Crack door open.
3)Next character throws grenade through crack.
4)Door closes.
5)Grenade is detonated remotely.

Now the classic non-lethal option is the flash-bang, and with good reason. Since it doesn't have a damage drop off it's rebounding damage is very good, meaning that most rooms are going to get 12s damage minimum to everything within. Other less lethal options include tear gas, neurostun splash, snare and flash grenades.

Going lethal we find an interesting problem: many of the nastiest lethal grenades will destroy the room or even blow down the door and hurt you. heck, the old standbys of white phosphorous or incendiary grenades will likely burn the building down with you inside it.

the obvious option for lethal room clearance is the frag grenade, as it's damage drop off means that you're normally getting a solid coverage with damage due to rebound and it's AP of +5 reduces the risk of it punching through the walls and door to injure you. A close second is the cluster grenade, which basically turns the entire room into a massive suppression fire zone which, with its rebound damage bonus, is going to normally be looking at 16P in a confined space.

Any other thoughts?