You're probably better off doing Teebo lead with phasma, ackbar, QGJ, Rey (or GS) until you can get Elder
This is not a full TM reduction team but has enough TM reduction to allow for Rey or GS to do damage. I'd probably go with Rey with this team as she can get rid of the pig guards quickly. GS is good cuz he can get assists - esp. stealthed Teebo and QGJ ones to do more TM reduction.
Switching in Elder for Ackbar makes a significant difference (ewok synergy, heal not as dependent on having debuffs to clear, and he can revive).
Soloing requires RNG for good TM reduction on the pig captain - that's why GS was better choice for 5th member for Lasserini's team. He can get assists that reduce TM but also does not trigger as much positive TM for pig captain as Rey (her flurry of blows registers as 3 attacks).
Also remember it's Teebo G10 PLUS scanner at g10 that is needed to get him to 80% potency which makes him viable but still RNG dependent. Should have at least basic and leader abilities omega'd.
Chirpa can serve as the fifth as well.
Teebo needs to be lead cuz stealth ability has 6 turn cooldown and need to have as much stealth as possible to land that 100% TM reduction on captain...but as Lasserini mentioned there are still some bugs with teebo's stealth.