How to adjust to 1/2 NLHE with a $5 to come in rule

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i play at a game with these exact rules. the 5 dollar open makes a 15 dollar open not seem big and i routinely open to 20-25 with one limper in front of me with strong hands, and never less than 15. i never ep limp with sc's and rarely with small PPs, only if i'm deep and a prospective villian is deep or i am fairly certain because of the dynamic of the table it won't be raised, or if it is it will be small