Impossible Kitava Fight

Hi, i don't often ask for help on forum about problems in game.
But now that's different, i can't fight Kitava with my current build.
OH no , it's not question of dps / life / if good or not.

The fight is totaly impossible.

I'm playing a Character lvl 46 , TRICKSTER.
Main skill : Lightning warp + remote mine support + other supports gems.
Using Detonate mines gems + spell totems
And sometime i'm still detonate mines myself ( Important ! )

SO, in Kitava fight any detonate mine will not works, even the one for selfcast.
I could understand if it was a problem of TARGET , because maybe Kitava is too big, his hitbox is somewhere where the mines cannot go.
BUT, i should be able to detonate the mines even if there is no ennemies to targetting, like in my HO or any area without ennemies around.

It's possible to detonate my mines in Kitava fight area, BEFORE start the fight, after that Kitava appears, it's not possible anymore.

It's really not funny when you got your own build, different one and you have no possibility to fight Kitava !

Should will all play stupid builds that works ?! Creativity is blocked ?!

Hope that message will be listen / read !

Still no answer........ :'(