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blackshadow1 - If you have three melee fighters, I'd suggest two of them with the 126 Str/58 Qck/11 Vit build - this will allow you to farm anywhere
and level a single fodder in the Kelp Beds. For your third fighter, I'd suggest giving one of the 2-fodder at once builds a try. For that, you'd want to choose between the Mire build, the Ghostlight Ruins build, and the Harpy's Roost build.
Mire is the fastest, but only barely. The best elements are Arcane or Earth dragons. Stats are 117 Str/72 Qck/20 Vit. Eliminates will not drop here, which sucks.
Ghostlight Ruins is almost as fast, but is a tiny bit slower, and requires more refreshes if you want to level past level 5, in my experience. The best elements are Water or Nature dragons. Stats are 115 STR / 76 QCK / 17 VIT.
Harpy's Roost is the slowest, but this one actually allows you to kill bosses, which the other two do not. The best element is Wind dragons. Stats are 108 STR / 75 QCK / 38 VIT / 15 DEF.
If you don't have a 25 in one of those 5 elements, I'd suggest the Harpy's Roost build. You have the least amount of trouble with mages in that location.
There's a pure farming build (129 Str/50 Qck/13 Vit), but that doesn't allow for easy leveling of fodder anywhere, and I suggest saving that build for either your second team, or if you do really well with the 2-fodder build above, turning your other two melee dragons into this after you're sure you can level as much fodder as you want with just the one dragon.
If you have a mage instead of a third fighter, I'd suggest sticking with the Kelp Beds fodder build - the builds for 2-fodder at once aren't the best for grinding the Coli. Consider either leveling up another dragon team, or eventually changing the mage into one of those 2-fodder builds.