Overload slayer enchanements gets its own dmg number and therefore has the ability to make the Band of Air ring's "Touch of Wind" proc. This has been tested: 84 procs from 500 hits + 500 troll slayer r1 hits on "Ice Troll_Grunt" from "The Frozen Heart" yielded a recection of hypothesis that slayer does not proc ring.
Because of this, slayer enchantment is one of the best overloads a dps character can use when fighting an enemy of a certain type. Therefore it is important to figure out if they are bugged or not. To test if a slayer enchantment works, i used it on the enemy type and looked in combat log parser if the slayer dmg popped up. This is the results:
All green slayer overload enchantments works.
Only 4 of the 10 blue slayer overload enchantments works: Giant, Troll, Dragon, Demon.
Also note that u cannot use 2 slayer enchantments for a mob type. If so, then only one of them will work, and if that one happens to be one of the blue ones that does not work, u get 0 benefit.
1