I know you can get extra equipment slots but I don't know if there is a limit on hero sets. I know I'm limited as I don't have enough memory points for a sixth set.

I see now there are only 10 slots.

I guess you would need at least 17 slots. Knowledge upgrade, building upgrade, attack for each troop type, defence for each troop type, maximum training, maximum invader attack, onslaught attack, town defence and maximum resource production.

I see now there are only 10 slots.

I guess you would need at least 17 slots. Knowledge upgrade, building upgrade, attack for each troop type, defence for each troop type, maximum training, maximum invader attack, onslaught attack, town defence and maximum resource production.

You might actually prefer 5 different sets for resources, and you totally left out one for max experience gained which will be super useful if they ever increase hero levels. However, the sets for attack and defence of each troop type are likely to be the same in the end, or at least you'd only really need two for defense.. one for tiles and one for town. All in all, I think 20 sets ought to do it, ideally without the increasing cost in memory points. ;)