Tips regicide

Don't rush the kills, you can play the game pretty slowly.

If a diamond enemy might appear next, think about how you would deal with it.

Prioritize playing play spades whenever a new enemy appears. This helps reduce the number of cards you have to discard when the enemy attacks.

Against a club enemy, a good strategy is to use spades to reduce its attack to 0. You can then play hearts, diamonds, and low-value cards freely. This also works against heart enemies, but it is less effective.

Don't be afraid to discard more cards than necessary if it means getting rid of bad cards, such as a 2, especially if you have diamonds in your hand.

When a new enemy appears, you generally have two options: kill it quickly, usually with clubs, or stall by playing spades. You can also try to recover resources by playing diamonds and hearts, leaving the next player to decide how to deal with the enemy. However, this makes stalling less effective.

Keeping an enemy's attack low (below 3) is often better than reducing it to 0, except against heart enemies or when you need to play hearts.

When attack of the opponent is low, don't hesitate to yield, it lets you discard your bad cards.

Solo tips:

1. If you see a lot of diamond cards in your opening hand, this indicates that there aren't as many remaining in your deck. Use your diamonds carefully; you may not see more of them for a while!
2. You want to go into each diamond opponent with a full hand, if possible, because you need enough damage in your hand to quickly defeat them, the discard fodder to take damage yourself, and the diamond cards to keep going afterward. The 8-card hand limit makes sculpting your hand in advance much easier to do than in multiplayer, so make use of this advantage!
3. Don't neglect your hearts! The thinner your deck gets, the harder it is to recover, as your heart cards will have a lower chance of putting back diamonds and power cards. Getting jumped by a heart opponent while your deck is thin can be backbreaking. Not even the Jester can save you if you run out of cards!
4. Hearts are worthwhile even when you only have a few cards in the discard pile. If you have anything at all in there that you want to see later, even if it's just one card, you'll want to put it back ASAP. For example, if you discarded the 5 of spades and the 5 of diamonds, and you want to see them together later in the game, then you need to recycle them while your discard pile is still small.
5. You might be tempted to fire the 10 of clubs immediately if you see it in your opening hand, but you will probably want to hold it for the Jack of diamonds. If you draw the 10 after the Jack of diamonds is already defeated, the Jack of spades is okay to use it on, since he can be annoying.