On a page where you have the choice of which Torch to light, set the Links up as a choice for each Choice -
Link1 = "Light Torch 1"
Link2 = "Light Torch 2"
Link3 = "Light Torch 3"
Link4 = "Light Torch 4"
Link5 = "Light Torch 5"
Link6 = "Light Torch 6"
You then set the Link itself to Change the %TORCH Values. If you Light Torch1 for example, the '+' settings could be:
TORCH1 = Reset 1
TORCH3 = Reset 0
TORCH6 = Reset 1
In the above sample, lighting TORCH1 lights Tourch 1, puts out Tourch 3, and lights Torch 6.
You can also restrict the Links to only show when a Torch is actually out. Click the 'show when not available' button on the first page of Link Restrictions (the stop sign) so the Link option still shows, but is not clickable.
If you need something more complicated than the above, then you'll have to use Scripting ':=' on each Link instead of the '+'...