Defenders Bastion and Archery Defenders?

So I lucked into 6 pieces of Defenders Bastion and I'm trying to figure out where to slot it in my TA/Archery defender.

I looked through some builds and see that a few people have placed it in "Oil Slick".. is there any reason for that?

Of course I've searched around and can't really find much. Anyone have suggestions on the best to slot this set for an Archery user? (* I love my sharp pointy sticks.. so help me out!!)

At first I threw it in Acid Arrow because it should go off every time, but Trickshooter convinced me to toss it into Blazing instead.

I thought that the ideal power was somewhere around 15 sec recharge, which is why I originally tossed it in Acid, which has a 20 sec base (this is all off my memory so forgive me for errors) and because Acid is meant to be spammed just like the Poison set due to its small radius, but I still end up using Blazing more often - but it won't go off every time with Blazing, just to warn you.

Well I slotted the set in Blazing arrow.

I kind of like it..

The damage and recharge on Blazing Arrow is noticeably better. It's now a nice spammable attack! The heal proc goes off enough to be useful and slightly amusing..

Go HEALING ARROW!

Thanks for the advice!

I slotted it in Explosive Arrow. No real reason, since I don;t often pay attention to 'the numbers'. Was that a bad choice?

Nice thing is that purpling it with a catalyst is a nice increase on the heal.