Sure, trial started
Apa
Hmm, the most optimal spot really depends on your stats. If you have a high defence level (you don't need food when training at sand crabs), then naturally the 4-spots are the best. If, however, you have lower defence, you need to consider your DPS - are you killing crabs faster than they spawn, or do they pile up on you so you take more damage? Answering this question will tell you either that a spawn point with more crabs or one with fewer crabs is more optimal respectively. A happy balance is the 3-spawns of which there are plenty. I'd suggest crab claw isle as it's usually a little quieter considering the 10k fee to access it.
Just activated a 24h trial on your account - let me know how you get on, and if you have any further questions then don't hesitate to get in touch!
Apa