[Bandit deck -which affinity and which card upgrade?]

I saw this thread:

https://forum.skylords.eu/index.php?/topic/3104-the-bandits-guide-to-pve/

and this

https://forum.skylords.eu/index.php?/topic/6493-new-player-bandit-deck/

 

I have a problem with affinity., I don't know which I should choose?

Corsair green or purple? I know that Commandos are better than Banditos, but I have 2 squads vs 3. I see that green is more expensive is it worth to buy green instead of purple?

Bloodhorn - I choose purple instead of red, ok?

Nomad - I see that most people choose Nature, so I choose nature

Soulhunter - blue or purple?

Bandit Spearmen

Bandit Sorceress?

 

Also I should first buy upgrade for T1/T2 creatures or T3/T4? Upgrade III cost is very high I must spend a lot of gold, so I must choose

No I play only pve, maybe in the future pvp