This modpack is for joining the DreadforDead server only so there is no server pack. 

I would reccomend allocating more ram if you have some to spare on your computer. the regular like 3.6 gb should be fine for most tasks but if you dont want to lag during more intense gameplay. like when a nuke is dropped, i would allocate 6-8 gb. here is a guide on how to do that ---- (7) How To Allocate More Ram To Minecraft (Guide) | Add More Ram To Minecraft - YouTube

TIP : look up videos on the HBM's nuclear tech mod. which is one of the main mods in this modpack. ( i would put links here but i think its more productive if you find what specifically you are looking for ). 

This pack uses quality of life mods such as journeymap and JEI.