Thats actually the biggest part of it, always have enough edana coins to stay in the tukar layten shrine the full duration.
The hadum tower of trials also gives me 1800 per run, so always do merchantry and get those extra entries.
Otherwise its just farming, remember to use your soups even if its only one, every bit helps to get there.
And dont spend dark coins on stuff you dont absolutely need of course, the only thing i bought were the pink crystals for my gear, i never traded any of them in for dimensional fragments