Conquer the Bonded Warehouse Event
Gold Stage 5: during combat: use ultimate 4 times or less - the best way to do this is to deploy 2 or 3 of the strongest DPS characters with AOE or hits multiple targets, namely: Abraham, Kate, Sherry, Andrea or Lake. Make sure Abe is in the number 1, 2, or 4 position to deal damage to 3 characters. You can deploy one tank (Tyreese or Beta) and either Eugene or Magna to support your other toons. Remember to equip your highest gear to your DPS characters.
Gold Stage 10: take out 2 characters in the front row first - Abe is the one to do this by deploying him in the middle backline or 4 position. Make sure to support Abe with the likes of Magna (speed) and Lake (backline +attack) to assure that Abe deals maximum damage to the frontline characters that he pulls first. You can also deploy Beta and Tyreese in 1 and 2 to assist Abe in dealing damage to those two frontline characters or have a Kate to help by using her Ult to those pulled by Abe.
Gold Stage 15: win by deploying characters that are all of the same class - Best class to choose here is the Ranger class, well because Abe, Magna and Andrea are there. Also you can deploy Je$us and Dwight with them. These are the 5 that I used to ensure the W for this stage. Remember to equip your highest gear to all your characters.
Gold Stage 20: deploy all tank character in the backrow - this is a tricky one that needs a bit of RNG to get the W. The 3 best tanks to use in the back row are Tyreese, Beta and George, since they are the best damage dealing tanks. You can also deploy Shane (shield and healing) for survivability. However, since my George & Shane are quite weak, I used my R instead. The 2 characters that I deployed in the front row are Abe (DPS) and Glenn (Energy and healing). Remember to equip your highest gear to all your characters.