Sword decision troubles... which lines to choose?
Alright, so I've run into a problem that I need remedied. Currently I'm looking to hammer down my plans for weapon progression, and have been using a Winmillion with much frustration lately. So I'm fixing the problem by investing in more useful swords.
Now, my current issue, is that I have to decide between a few lines... namely Brandish (Combuster or Glacius and Acheron) or Sealed Sword (Divine Avenger and Gran Faust) and Leviathan or Cold Iron Vanquisher.
I'm not sure which lines to go into, I just know I want to have a ele/norm, shadow/norm and a straight up normal sword to work with. Now, what I'm currently leaning towards is Acheron with either Combuster or Glacius, since it doesn't matter much to me, and then Cold Iron Vanquisher. I'm looking to have useful charge attacks as well, since they are extremely helpful when I get into tough binds and need to let off a big hit.
So, anyone have any thoughts on my dilema, I stated it all assuming end game and infinite resources, to make things easier.
(Clarifying)
Combuster/Glacius vs Divine Avenger
Acheron vs Gran Faust
Leviathan vs Cold Iron Vanquisher (Do I even need a 100% normal weapon?)
Any specific reasonings for those choices in particular?

Leviathan has great knock-back and is slightly faster than the Cold Iron Vanquisher. With the Divine Avenger, you won't need the Vanquisher to begin with. The Glacius/Acheron are simply far more practical than the Combuster (former is useful in the Citadel, later is useful in the Jelly King stratum).
Ah, kay. Curious though, why would I need multiple elemental swords? (both Glacius and Divine Avenger)
Updated the original post clarifying which I'm deciding between for each category ^^. Since I think want a Normal, an Elemental, and a Shadow. (And thanks for the help thus far)
Seems no reason at all to get a Cold Iron Vanquisher. And I was already leaning towards Acheron.
It's worth it to get Cold Iron Vanquisher if you want a cool looking chain on your weapon. Acheron or Gran Faust are the shadow weapons of choice. Gran Faust is more defensive and slower attacking, works better with vog armors. Acheron is a 3 hit with less knockback and works fine with vog or skolvers. Divine Avenger's charge attack is mightily useful for soloing, especially if you are not a good gunner or dodger. However, with Leviathan (or CIV) you will have a fantastic soloing weapon, the the option to go with glacius or combuster is equally valid. Decide if you like burning things or not, cause combuster looks cooler. That being said when PvP comes around most everybody will be rocking some kind of fire resist thanks to Firestorm Citadel so...
How useful is the Gran Faust's Charge? I hear it's quite the gamble to use often, and I like having a useful charge, unless it's normal attacks are just THAT good that I'll never need one. (And I know the Acheron has a REALLY useful charge due to it being the standard brandish charge, which is a very powerful slash)
Also, I prefer solo'ing, and am usually only small grouping if I group, so would Divine Avenger be a better choice over the Combuster/Glacius? And finally, with an Elemental/Normal and a Shadow/Normal is there any real reason to get a 100% normal weapon? (Such as the calibur line) Or will a normal weapon cover bases that the other two cannot?
Acheron/Glacius, Leviathan, Divine Avenger.