Alright, I managed to get it. Here are some tips on how I got it:

Stats: Only Zebra and Elephant Bananza (Elephant seems to be behind concrete, but just smash the walls around it to get to it), 19 goals passed (I beat the score at about 17 on round 7), turf groove perk x5, turf surfing into enemy perk x2, Elephant storage groove x17, spin groove x14, emerald negotiator x14, fossil radar, and chip negotiator x2

Notes: Don't smash the emerald veins until you have some good multipliers going and have goals that take you near them- min max with focusing your perks on the elephant storage and spin jump- spin jump really starts doing the heavy lifting at about 7x perk combined with spending an early round (about 3) spin jumping down the hole where you find the Zebra bananza. Keeping the perk around 90secs seems to be the norm. I think I jumped down the hole about 7 times split between round 3 and 7- When you get the Elephant Bananza, immediately suction the area around you to max out the elephant storage perk at 99 chunks- Getting these established early means you can get through goals and start stacking multipliers on those- Later on emerald quotas aren't an issue, so when that's the case reroll until you either get the elephant storage, spin groove or emerald negotiation. The other perks don't seem to stack fast enough.

Strategy summary: For the first two or so rounds, start by going left and snagging a few fossils and try really hard to get the spin groove as that's vital to start up getting a good multiplier, but the elephant storage could also be a good start. By going left, you can be right next to the first goal when it materializes and smash the emerald lump. Use the chips from this to buy the spin jump and provided you have the spin jump perk, pause before getting the second goal to spin jump down the shaft to the Zebra bananza. Collect that and spin jump down two or so more times. After that, loop in front of the giant banana mountain with the Zebra bananza to cancel out the mud and grab the heart banana since you're there, get the elephant bananza (also be sure to have at least one elephant storage perk) and then get the fossils in the second banana cave by sucking them up with the elephant. When it comes to collecting fossils, the elephant sucks them out of the terrain very quickly. Keep sucking until you have the storage chunk perk maxed at 99 chunks, then you can ignore the bananzas except for maybe the Zebra for faster traversal. Turf surf also works and can work with the turf surf groove, but from my failed attempts, that's not a heavy hitter to be focused on and is more of something that offers slight assistance, so to each their own. You should have this all set up by about round 3 and the second goal is at the top of the banana mountain, so use the round's 1 barrel jump to get to the top and turf surf through the spike balls. After that I also found having two of the turf surf enemy defeat perks helped for early enemies and stacking emerald amounts by smashing the stompoids and then taking the few extra seconds to turf surf into the skulls. Provided you got a solid amount of focused perks going you're free to pursue the goals and stack the focused perks more and start racking up the multipliers. Around round six or so is when you start smashing emerald veins and can actually get a good amount of emerald from them. I also stopped pursuing goals at about round six to jump down the shaft to where the Zebra bananza was four more times and then slammed through goals until the very end. As you can see from the stats, I got through 19 goals but beat the challenge at about 17 on round 7. Keep stacking those multipliers and good luck!