I have i7-7800X CPU @ 3.50GHz

Trying to see which CPU miner is best for lyra2z... anyone know...? I tried 4way and AES-avx2. they seem to get the same KH and KH/s.
For aes-sse42, it seems i get lower.

From personal test, it seems like aes-avx2 is way to go. can anyone confirm? also, what would be safe CPU temperature for CPU mining?