Minecraft authentication servers are down 1.7.10

#Minecraft authentication servers are down 1.7.10 mod
#Minecraft authentication servers are down 1.7.10 mods

22:19:37 at .ServerConfigurationManager.func_72389_g(ServerConfigurationManager.java:888) 22:19:37 : net/minecraft/entity/CallableEntityType 22:19:36 at .RelaunchClassLoader.findClass(RelaunchClassLoader.java:227) 22:19:36 at .RelaunchClassLoader.findClass(RelaunchClassLoader.java:238) 22:19:36 : net/minecraft/world/CallableLvl2

#Minecraft authentication servers are down 1.7.10 mods

The problem is I have to use MultIMC because I want to add another dozen or so mods that aren't in the DW20 pack but I use them. So what gives? I know the pack works because it loads just fine in the FTB launcher. If I am at the threshold of the max amount of mods, just adding one makes it break.

#Minecraft authentication servers are down 1.7.10 mod

At first I thought it was an incompatibility between mods or something, but I can remove any mod from my pack and it works. Failed to login: The authentication are currently down for maintenance.' There's a missing 'servers' after authentication. The image attached reads: 'Failed to connect to the server. I've tried increasing the RAM allocated in MultiMC but it doesn't have an effect at all. Before I realized the sessions servers were down today, I tried to log onto my server. Then suddenly it refuses to load up a world. I get pretty close to adding all the mods.

To be clear: I am beginning by just trying to recreate a pack on MultiMC that is identical to the DW20 pack. I have been adding mods one at a time to my custom pack and what inevitably happens is when I get enough mods installed, minecraft shuts down when trying to load a new world. I'm trying to use the Direwolf20 1.5 beta pack as a base. Ok I'm trying to set up my own custom modpack, using MultiMC since the FTB launcher does not let me do this for some reason.