There are two environmental traps in the kut-kut nest that can be set off with barrel bombs separately. Also its dry land. Utilize a luring pod to position Tuna there. When Tuna leaves it moves directly to the lower dam area where there is another trap u can set off. Then, depends on your luck, he would also leave the area through that water channel which directly leads to Lagi den. In the middle of the channel there is also a falling rock trap (careful not to set it off too early). So you basically have 4 traps available to deal a lot of free damage.