This is primarily a Feature Request, but I will also mention an extremely relevant bug.
Bug Report:
Currently, basic meat items increment the slimeling's charge counter, but they don't actually provide MP charges. This has been posted once before, but I'm restating it here because it is closely related to the requested features.
Feature Requests:
Slime stack counter
Add a second counter that tracks the number of basic meat items fed to the slimeling. Whenever a slime stack is dropped at the end of combat, decrement this counter by one. This counter could be displayed next to the current one.
Example relay browser text:
Familiar: (~40.0 full, 5 stacks)
If there are currently 0 stacks, it would be reasonable to omit stating "0 stacks", as some HC players simply do not bother with stacks during the course of a run (especially if not under a Muscle sign).
Fullness counter reset trigger
When the slimeling does not display messages during combat, it means he is out of MP charges. When this occurs, reset the slimeling fullness counter to 0. Currently, it is possible to get fewer than the estimated number of charges, which causes a misleading positive balance.
As we all know, the slimeling is extremely popular, so I hope these suggestions will be considered. Thanks!