"Enemy spotted. Oh damn he's big... Yulya, should I summon Nixie?"
Yulya looks at Ashley
Nonono thats way too loud! We need the element of surprise and the Troll is still too far away! Summon Nixie simultaneously with Cat and Alice attacking the Troll so she also has the element of surprise! I shall head a bit further West and hide there. I must be sure that the encounter happens within my spell range!
I suggest you summon more wasps to distract both the bandit and the troll! Lure the troll to where Cat is going and keep the bandits attention further South-East!
Yulya moves 15ft W and hides behind the tree