What planes should be avoided?

If you are not a spender, you shouldn't buy planes using golds, use slivers instead. There are many unreleased aircrafts, wait for them.

Mitsubishi A5M4 is definitely the Best plane on my opinion. Fast, agile and deadly.

I16 is also à good plane regarding its 4 Guns and also have bombe (missiles in fact).

I dont like DO 17 E1 because it Takeshi too much reload bombe, and it is very difficult to attachments planes because slow turns.

I have enough silver for junker ju 87 but i'm afraid it will have the same problem ad DO17...