Slay The Spire

The Ironclad is best known for using either a lot of armour or a lot of strength. Use the relics and cards offered to your advantage, and use the merchants to get rid of cards that might not work in your build.

The two main strategies I find help with The Ironclad are either;
1. Use a lot of strength and dump your block cards. Strength can make it easy to one shot a lot of enemies and cards like "Limit Break" that double your strength, mixed with using "Flex" can make you incredibly strong, really quickly. Potions will be important for healing or getting off to a quick start in boss fights.

2. Armour builds are, in my opinion, the more consistent. Build up armour so you don't take any damage and get cards like "Body Slam" that are stronger based off how much armour you have. Even on higher ascend levels you don't need the BEST cards to be able to win comfortably. That said cards like "Barricade" that keep your armour from one round to the next are very nice.