The presence of luck-based mechanics in a strategy game can be both a blessing and a massive frustration.

However, it still exists in subtle ways that can completely alter the outcome of a very close match.
Starting Hands and Card Rotation
Your starting hand is entirely random, which can immediately put you at a massive disadvantage against an aggressive opening.

Once the initial hand is played, the rotation becomes fixed, and pure skill and memory take over.
Flexibility is a skill.Track the opponent’s rotation after the first cycle.Some RNG is healthy for the game. Troop Movement Quirks
Sometimes a unit will retarget unexpectedly due to a micro-movement by another troop, completely ruining your defensive setup.

Leaving a slight margin for error in your defensive placements is the best way to handle AI unpredictability.
Game StyleLevel of LuckAuto-ChessExtremely High - Relies entirely on shop rolls and item dropsStandard Tower RushVery Low - Only the starting hand is randomized Accepting Randomness
The best competitors accept the chaos, focus on what they can control, and outplay the opponent regardless.

If you are stuck in a lower arena, it is because of your fundamental mechanics, not the random number generator.