BLUE TONGUE SKINKS

Ok, so im trying to learn a few things about oxalates and giotrogens. From http://www.moonvalleyreptiles.com/uroma ... ens-toxins it states that Collard Greens, Mustard Greens, Turnip Greens, and Watercress are giotrogens.
From http://www.whfoods.com/genpage.php?tname=george&dbid=48
it states beet greens and collards are all high/moderate in oxalates.
ALL of these are all staples to a blueys diet on this website. I really want to incorporate healthy greens into my bts diet but am having a hard time/reading conflicting information.

I guess based on those 2 conclusions above, the remaining staple greens are arugula, dandelion greens, endive and escarole?
And it also makes me think collard greens are not the greatest, seeing as how it is high in giotrogens and oxalates.
HELP

Oxalate forms an ionic bond with calcium to become Calcium Oxalate, or Ca(C2O4). By doing this, the calcium is bound into a compound which is not usable by the body. Therefore, high oxalate veggies are not recommended to be fed in large amounts because they reduce the amount of calcium that your skink receives from its food. Calcium oxalate is largely insoluble in water and therefore can cause kidney stones. Oxalate is toxic in large amounts. However, veggies high in oxalates are not a problem as long as they are not fed frequently.

I don't know much about goitrogens, but I do know that they interfere with iodine intake.

Goitrogens prevent the thyroid from functioning correctly by preventing the body from absorbing iodine which can cause serious issues.

So would Collard Greens, Mustard Greens, Turnip Greens, and Watercress be considered more of an occasional instead of a staple since they are higher in Goitrogens?