Unless I’ve skipped over them, I’ve never seen any troops or heroes with skills to help compensate for this when putting together a team that works well together. I find it odd since we have ways of compensating for nearly every other drawback in the team if we are patient enough and get lucky enough to get the right hero or troop.
In teams where most of the heroes have high attack and damaging or attack increasing specials, but lower health — the team can be made well rounded by adding one or two heroes like belith 3 , hawkmoon, 3 , sabina 4 , rigard 4 , etc.
In teams where defense is on the lower side for multiple heroes; adding a hero like Brienne 3 , Gunnar 3 , Kiril 4 , Magni 4 Kadilen 5 etc can help add some more balance for the team because of their specials.
And ofcourse theres a bunch of heroes with special that lower opponents defense and/or increase allies attack power if a boost in attack is needed.
Adding a 3 star or higher troop with a high attack percentage increase and a critical hit likliness increase also can help an individual hero with lower attack— especially if the time is taken to level the troop up aswell. There’s also a lot of troops that focus on adding health points, aiding in health recovery from specials and adding defense points to heroes lacking in there own protection in exchange for great offense.
So I think it would be well appreciated if we got normal (non-event, non-hotm) heroes with special skills that help compensate for allies with slow mana speeds. Example a 3 hero could have a secondary special skill such as “allies generate mana 20% faster for 4 turns.” A 4 or 5 star hero could have a special skill like — “allies generate mana 22% faster for 6 turns” or “allies generate mana 27% faster for 4 turns” or similar.
If not heroes that help compensate for slow mana, than troops atleast. If someone has a high star hero with good health and attack already but too slow mana this could be more helpful for making a hero more viable than increasing how they respond to health buffers or increasing likelihood of getting a critical