My opinion:
Troop Command and Siege Pack cost no mana. I think it should be 10 mana for each use mininmum
Especially Adv. Troop Command is a end gamer siege item. That should cost some more mana to use. Because it doesn't cost any mana using these items. Most other items cost plenty of mana, like the kinetic shield costing 25 mana (kinda much, since enemies can just creep near you and its not protecting), it suck compared to troops which distract weapons fire.
There is some other items which also cost no mana, but this topic is mainly about troop summoner items
Edit:
Also, while buildings have lot of Armor, the siege pack aura seems to nerf their armor, does this also buff your weapon items damage vs those buildings??
Troop Command and Siege Pack cost no mana. I think it should be 10 mana for each use mininmum
Especially Adv. Troop Command is a end gamer siege item. That should cost some more mana to use. Because it doesn't cost any mana using these items. Most other items cost plenty of mana, like the kinetic shield costing 25 mana (kinda much, since enemies can just creep near you and its not protecting), it suck compared to troops which distract weapons fire.
There is some other items which also cost no mana, but this topic is mainly about troop summoner items
Edit:
Also, while buildings have lot of Armor, the siege pack aura seems to nerf their armor, does this also buff your weapon items damage vs those buildings??