Deluge Settings and Public Torrenting!

[dulo]

Hey everyone:
I'm currenting using deluge on my NAS to DL/UL from this awesome website but I have a few technical questions that I cannot find answers in the forum and google

1. (Since I have not used the QTM to upload any file from my library) So is any torrent I got from this website automatically disable DHT, PEX, LSD, etc and does Deluge(mine is ver1.3.15 from linuxserver/deluge on Docker) strictly follow the rules of not using any DHT, PEX, LSD for those torrents?
2. If they automatically block connections others than peers from the trackers, so could I enable the DHT, PEX, LSD, etc on my Deluge so I can download public tracker torrents on this same client?
3. I attached my settings pics down there, is the encryption setting correct for this private trackers torrenting and would it be correct for public trackers if the answer for question 2 is yes?
4. is my cache settings a good number for minimize the stress on my mechanical hard drive since I enjoy the maximum downloading speed of my cable (DL:230Mbps/UL:11Mbps)?
   Thx for any helps on my questions