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First off dont use PR as a way to measure, its not been used in years and means nothing really. Moz's DA & PA are a better metric to use but even so should only be used as a hint not an authority on ranking. Ensure you are optimized fully on your site I can see a few areas you could improve, also i can see you've made a lot of landing pages for different areas this isn't the best tactic to help really. Especially as the content is the same its all just diluted. I'd recommend also doing some local citations to help you, get some people to leave you a review or two nothing spreads better then word of mouth etc. Try not to focus on what your competitors are doing and try to focus on what makes you the best electrician in Perth, e.g. you can make some guides of how to fix guides good share material etc. etc. Keep focusing on what the user would want, where the user maybe finding you and try not to focus on PR or your  competitors. Hope some of that helps.