How effective are mosquito patches? and recommendations?

YES, mosquito patches help me. I buy the Vit B mossie patches and the citronella bracelets and I put the patch up on my arm and the bracelet around my ankle plus a light spray of mossie spray if they are hovering about. If I'm in a non malaria or dengue area I don't care what brand the spray is but if in a known disease prone area on goes the DEET like Bushman's. A few of us also reckon taking Berocca at sun up and late arvo also helps (vit b) but some dispute this. Works for us. Another natural remedy that mossies seem to hate is lavender oil if you don't want to use too many insecticides. Maybe try putting some Lavender oil in a spray bottle with some water and misting it over your clothes (I haven't tried this yet).