Strong farming army with witches?

Hi,
For the coming witch event i wanted to ask if you can please recommend on a strong farming army that take advantage of the huge dark elixir discount for witches.

I'm around crystal, farming for everything for defenses, lab & heros.
AQ 35
BK 30, upgrading.
Lvl 4 freeze
Lvl 5 valk
Lvl 3 lava
Lvl 2 bowler research ongoing.
All other are th9 max troops.

Thanks in advance!

There are quite a few bowler / witch videos on-line. Not sure how lev 2 bowlers would do, but its worth a look. I plan on playing with a few of these during the event even though my witches are still upgrading to lev 3.

They seem quite strong against ring bases which aren't hard to find.