Oh I see, thanks for the clarification.

For example Sweden; and these strategies have priorities in them, etc.
random_list = {
75 = { set_strategy = ai_strategy_resource_expansion }
25 = { set_strategy = ai_strategy_industrial_expansion }
}
set_strategy = ai_strategy_maintain_power_balance
random_list = {
50 = { set_strategy = ai_strategy_conservative_agenda }
50 = { set_strategy = ai_strategy_progressive_agenda }
}

No, paradox games have scripts for the AI what behavior they favour and more likely gonna use with random lists and procent chances.

What do you mean with strategies? Custom events?