Pruned block chain and 1024 for peers out.
Discussion
Try this:
```
p2p-use-ipv6=true
prune-blockchain=1
sync-pruned-blocks=1
in-peers=1024
out-peers=1024
```
Depending on how you are running the monerod, you will need to raise LimitNOFILE / ulimit -n, the safe value for the config snippet above is 4096