Does Viktor Leaders ability trigger at the end of combat if he and another non recruit token die at the same battlefield?

No, Viktor, Leader's ability does not trigger in that scenario.

According to the RiftJudge FAQ (ID 7419, 7662, 4253, 6953, 8082) and Rule 376.2.c.2, Viktor's ability requires him to be on the board immediately after another non-Recruit unit dies. If Viktor and another non-Recruit unit die simultaneously (such as during combat damage or a board wipe), Viktor is no longer on the board when the trigger condition would be evaluated.

As stated in Rule 376.2.c.2:

"A Game Object will not be able to successfully be able to evaluate its Trigger Condition, however, if it leaves the zone that its Trigger is active from at the same time that its Trigger is satisfied."

Because Viktor is in the trash at the same time the other unit dies, he cannot "see" the event, and his ability does not trigger.