Arknights 5-7 (tips on description)

It took me a while to figure out how to clear this map because I'm dumb.
The idea first is to destroy the blue drone (with magic) on the left first then the one top right because the unit on the bottom left is unaffected by the freeze. Try to damage as much as possible 3rd blue drone.
You need to build Cost Point fast that's why I used 3 vanguards at the start.
Be careful, the purple drones at 2:20 and 2:50 are a pain to destroy because they go in a straight line. You'll probably need a strong Ranger.
If don't have good tanks, Cuora is still an excellent free Defender but you have to use her at the top part of the map because of the 2 red axes at the end.
You probably don't need strong healers. Cuora's 2nd skill is enough to tank the 2 red axes