This server looks like old L2 Renewal server, but with better stuff and Freya. Older renewal was Epilogue or Gracia Final.
I think you will sucessed.
About Cov and Magnus buffs 20 minutes, if its equal to old L2 renewal, so at your AIO you should have 2 hours buff no?
Reply please and check your mail.
Nice server, i will join it :D