(3.5) Gestalt balance

[Ilmryn]

In a campaign I'm running, I'm using gestalt to compensate for the fact that I only have two players. The question is, can two 6th level gestalt characters succeed in an adventure desinged for 4 6th level characters(premade module)?
My players are not that heavy optimizers, but a little can be expceted. One of the players will be running a Warmage6//Rogue6, the other wasn't sure but was considering Swordsage//Warblade, going for the master of nine PrC.
I'm considering throwing a DMPC non-gestalt healbot into the mix.
Do you think these characters will survive The Sunless Garden?

[Gnaeus]

My players are not that heavy optimizers, but a little can be expceted. One of the players will be running a Warmage6//Rouge6,

I don't see how cosmetics improve a Warmage.

Do you think these characters will survive The Sunless Garden?

If it is normally balanced for 4 level 6 characters of tier 3-4, they should be ok. A gestalt PC is often worth about 1.5 normal characters.

[WarKitty]

I'd recommend sending the healbot along. Or allow them each a free cohort. The major issue with gestalt is action economy.