Multiple events that are triggered by the same event or timing window can be resolved in any order if they are all abilities being used by the same player. If multiple players are involved then initiative order comes into play.
If you look closely TLT's second attack and gunner ALMOST have the same trigger conditions, but not exactly. TLT comes after the first TLT attack. Gunner comes after an attack that didn't hit. If the first TLT failed and the player attempts to use the second TLT attack and then Gunner and the second attack does hit then Gunner could not be triggered because the second attack has Hit. Gunner specifically states it happens after an attack that didn't hit. If another attack hits after a missed attack but before gunner then the 'game state' has changed and the trigger is no longer valid.
Rudor and Dengar are in response to defenders being attacked.
