A lot of the things that you mentioned arn't REALLY possible.
● optifine on public modpacks? - that can be reported. you can't get permissions to use optifine in your public modpack, you can only recommend that.
● also Shaders - not really possible either. a lot of the mods have problems with it, it's more for vanilla-style clients.
● then Dimensional doors - the creator said he won't make a version to MC 1.7, so again - if you want a modpack with new mod versions this isn't possible.
other than this three notes, I can recommend you use my modpack, because you won't find any good modpack with these 3 notes that will be good, stable and illegal.