since attack defense is harder to come by
It'll be interesting to see for how long that remains true for.
Just looking over the last year when a brand new building is introduced with both stats it usually has a higher Defense for attacking army then its Attack for attacking army. But there are also quite a few power houses for attack in the game and offered slightly more often.
Forge Bowl 2020: Main building: Olympic Treasury (
Defense 10%-26%) + Daily Special 2019: Colossus (
Attack 7%-15%)
St Paddy's 2020: Celtic Forest Set (
Defense 6% +
Attack 4%)
Spring 2020: Main building: No stat boost + Daily Special 2019: Fire Pagoda (
Attack 6%-12%)
Archeology 2020: Main building: No stat boost + Daily Special 2019: Carousel (
Attack 4%-8%%)
Soccer 2020: Main building: Hippodrome (
Defense 8-17%) + Daily Special 2019: Altar Garden (
Attack 3%-7%) or Winners Plaza Lvl 2 (
Attack 5-13%)
Summer 2020: Governor's Villa (
Attack 16-33%)
Fall 2020: Main building: Harvest Barn Set (
Attack 12%
Defense 8%) + Daily Special 2019: September Cottage (
Attack 5-13%)
Halloween 2020: Main building: House of Horrors (
Attack 6-14%
Defense 6-14%) + Daily Special 2019: Abandoned Asylum (
Attack 16-24%)
Winter 2020: Main Building: Winter Bakery Set (
Attack 15%
Defense 18%) + Daily Special 2019: Winter Train (
Attack 10-22%)