I think its a good idea.  Perhaps have the option to swap it for two different drinks.  One with mana/mana regen one with endurance/endurance regen? or something else, whatever is most popular but just so that both food/drink are useable by all classes

What dps classes are viable and parse highest in t5-6 assuming with max augs etc...?

You dont need War AND sk in the same group.  They serve the same purpose and neither one can be considered a viable dps to put in that spot.

What about SK vs Warr early on and Which DPS classes work best to fill the rest of the spots?

In my group for progression right now, before i get ANY further.  Am i better off using a SK in place of the warrior up until t5.  Also by doing so, should i drop one paladin for another dps?

Or outside of any of that, should i replace the ranger with any other class that would benefit me more?  I really dont want to level up a million characters so I would like to get it set now lol.

Just curious as i have like 10 levels 70 of different classes now and all are t1/t2 flagged, but i dont want to move into t3/4 farming until i have a group that truly is ideal to get me the whole way with the least struggle and best farming ability.

I currently box War/Pal/Pal/Mnk/Rng/Clr

I can box 7-8 but mainly stick with 6.  Are there any classes i should sub out in there for another?  I dont want to keep making more and more characters, id like to look into a solid group to progress far into the content.  Also, if i could do 7-8 what would be ideal to add to that group otherwise