Besides purchasing gems, what from the shop is worth buying? The only chests I’ve ever considered are the elemental ones such as Might of Fire :
The cost is 1500 gems for 4 EHTs (1200 gem value), 2 rare heroes (600 GV), 2 troops 3* (400 GV), and a 1* trainer for filler. That’s a 2200 GV, for 1500.
I save the EHTs for seasonal pulls, and feed off the rest.
Edit: I’m not exactly looking for advice. I’m just curious as to what players spend on. Everyone has their reasoning, and I value other points of view.