Have completed the special event '2v2 Practice Challenge'

This event came out just a couple of weeks ago. You can challenge this event as many times as you can. The reason is There is no limitation of the opportunities to challenge that.
I reckon the purpose of this event is that You could understand how to deal with this event properly like which units you could use.

It has been pretty some time that I posted here when I got reached the challenger stage for the first time. Now I've reached quite often the challenge stage afterwords so far.
If you happen to know How I could complete the events or get in to the challenge area, Just let me know by putting the comment below.