Not trying to advertise for any particular company, but I have used Beastnode a few times. I have heard for 1.10+ packs, your computer should have at least 8gb ram, so if you are hosting a pack off sight, depending on the number of mods and the number of players, I woudn't do anything under 12gb for a mid size pack with 5 or less people. If you are going to run heavy packs like SevTech, Beyond, or Enigmatica, you will want more probably. Start with what the host recommends, add 2gb to it, then scale up if you get lag. Hope that helps a little.
Disclaimer: I am not a server expert, just a trying to help.