if you join as an ally, you can go onto the ally forum (which we have few members in) and play with us a little while still maintaining in your own clan. as for being a full member, you get to play in tournaments with us, play anytime (we also play BF3 allot if your into that) and have access to multiple forums. (Once in a legit clan, forums are important for updates and times and organising battles) and im sorry, multi clanning is against are rules, they are as follows:

1. Members must log into the website at least once every 2 weeks. Failure to comply will result in your membership being carried A.W.O.L. and loss of rank. Being carried A.W.O.L. for more than 1 month will result in removal from the clan. If you return prior to the 1 month limit you will be required to contact one of the Leadership Council members with an explanation. (We here at SoA realize that there is life outside of gaming. If you are going to be away for a while we ask that you post this in the forums)

2. Boosting/Glitching/Hacking or Cheating in any manner will NOT be tolerated.

3. Multi-Clanning will NOT be allowed. This will result in IMMEDIATE DISMISSAL from SoA.

4. No Disrespect of fellow SoA members. This includes racism, trashtalking, t-bagging, etc.

5. Teamwork. We expect ALL of SoA to play together on the same sides. We understand that this may not be possible at times but we expect you to make an effort.

6. Chain of Command is in place here at SoA and we expect it to be followed. Try to the best of your ability to follow orders while in-game.

7. Your website/forum name MUST match your PSN username to avoid any confusion.

and im not sure on the HC thing, we generally play whatever the majority of the clan mates want to play. if you bring it up it may be played. and as we grow bigger, there will be TONS more people that will play HC modes freely.