Ok, here is the starting situation. One turn a day minimum!
Far east leads to a corridor exit; the tide of trogs is to the west but there are trogs ahead too.
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THE CHASM, Start of Turn 1
Cavern Far West
Relle (C11): 1/34 [MA [FA FE [SF DU IM] (2F) (rope)
Chunn: 28
Ranto: 4 (rope, 4 cylinders)
Xavier (C9): 2(1A)/60 [MA DW SF] [FB FE AS] (0F) (1 cylinder)
Gallador (C4*): 1/6 (5F) (1 cylinder)
Rah: (C9): 2(1A)/41 [SF DW WS] [FE FA] (5F) (1 cylinder)
Cavern West
Rianna (C11): 3/38 [MA DU FE] [FA DW AS] (1F)
Rand (C4): 2 (1A)/4 [DW] (4F) (Knife)
Azarl (C7): 1/10 [MA] (3F)
Galder (C7): 3BH(2ABH)/52 [PA DU IM] [DW FB CC SF] (2F) (1 cylinder)
Con (C7): 1/39 [FA EE] [CC DW] (4F) (1 cylinder, blaster, slingshot)
Dak: (C9): 3/45 [TW IM WS] [FE DU SF DW] (2F) (1 cylinder)
Almir: 2
CHASM IS HERE
Cavern East
Trogs x5
Cavern Far East
Trogs x5
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Ah dammit, the the rope is one back with Relle, innit?
How about this, this round Relle gives Rianna the rope, Con, Galder and Dak jump the chasm and attack the trogs. Ranto, Gallador and Xavier advance. Rand and Azarl lend a force hand.
And next turn Azarl and Rianna jumps the chasm and she ties the rope around something. Relle and Rah advance. We in the front try to clean up more space
Then Almir climbs over, and everyone else that we think can't jump does so too as well as everyone else jumping (the last one takes the rope). The front continues trying to advance. Chunn dies, and we live happily ever after.
Does that sound at all feasible?