Need some advice

I've got max distance 32.730 meters.
I've got 27.000.000 unspend DNA & 15.000 unspend Pearls. Been hoarding these for update 2.0.

What would you suggest I do with them?
27mil DNA would increase my max distance by 66 meters or GL multiplier from 450.000 to 770.000.
With 33mil DNA from Super Ecdysisis, 60mil total, would increase my max distance by 105 meters or GL multiplier from 450.000 to 1.184.000.

So should I spend my DNA to increase DPS or GL multiplier?
And 15.000 pearls would increase my max distance by 40 meters, how much the increase would be approx if I spend all pearls upgrading King Crab instead?
I didn't quite understand which King Crab parts actually affects my main game and which not? What I understood, only Magma Parts affects main game. I am at rank 13 now and haven't gotten any yet. Do they have huge impact on main game whenever I get those parts?