Which 4* to keep?

cooperbigdaddy

So I currently have 1585 Hero Points. I'm getting Silver Surfer (my first 5*!) 7 days from daily supply. Also, in 21 days, I'm going to get Deadpool (X-Force) from daily supply.

But in my queue, I have

Venom (Eddie) expiring in 10 days
5 , 1 , 1 2* Hawkeye expiring in 3 days
2 2* HT expiring in 2 days (no tips needed here, just super annoying these are both green and not ANY other color)
1 , 1 , 1 2* Thor expiring in 6 days
2 , 1 2* Bullseye expiring in 7 days

So my first thought is in 6 days, sell my max Thor and Bullseye and start building them again. I will then have 1835 HP and I will spend 1000 for Venom and try to get 165 HP by the time my Silver Surfer is about to expire. Also, I was hoping to start building my Hawkeye back up with the covers in the queue.

But is this a bad idea (any of it)? Should I sell max Thor and Bullseye and not start building them up again just yet? Should I not start building Hawkeye up instead? Should I just sell my Wasp or Venom (or someone worse I don't know) and keep pushing my 2* farm as hard as I can?

What does everyone think I should do?

(My roster is in my signature)