This is the point.

But this is to get it to level 14, how about levels 15 and 16 ? Does lvl15 revive 35% of defense as well and then lvl16 40% of offense ? of both ?

Alyona Kolomiitseva said:

Greetings. The price was set according to data analysis and game balance. Unfortunately, we are not planning to change it.

It is an imbalance in itself, infirmary upgrades before sketches were equal... 30% free revivals for offence and defence troops and you didnt have to pay for the privilege. Now for sketches it splits 5% per infirmary upgrade to give offense up to 50% while defence still remains at 30%.  Not exactly what you could call game balance, if one is given increase while to other remains as standard.

It is an imbalance in itself, infirmary upgrades before sketches were equal... 30% free revivals for offence and defence troops and you didnt have to pay for the privilege. Now for sketches it splits 5% per infirmary upgrade to give offense up to 50% while defence still remains at 30%.  Not exactly what you could call game balance, if one is given increase while to other remains as standard.

necab15-games said:

It is an imbalance in itself, infirmary upgrades before sketches were equal... 30% free revivals for offence and defence troops and you didnt have to pay for the privilege. Now for sketches it splits 5% per infirmary upgrade to give offense up to 50% while defence still remains at 30%.  Not exactly what you could call game balance, if one is given increase while to other remains as standard.

But it's not a typical situation when you leave your Offense outside, right?  

Exactly,  increasing only offense free revivals % that are defending city, doesn't serve a lot of purpose for infirmary upgrades. 

The point is that the infirmary upgrade to the sketch level has only an occasional marginal use to protect idiots from their own mistakes (if you leave 100 agemas outside AND they get killed you get 35 revived for free instead of 30) and for that barely useful feature the game wants you to pay the heaviest toll in sketches of any building improvements??? Definitely something wrong with the math here.