He wāhanga tino tika te aratohu raina, nō reira me tino tupato i te wā e whakamahia ana, ahakoa te whakamahinga o te aratohu raina mahi teitei, ki te kore e tika te whakamahinga, kāore e taea te whakatutuki i te hua mahi e tumanakohia ana, ā, ka ngāwari te pakaru o te aratohu raina. Nō reira, me aro ki ēnei whakatūpato i te wā e whakamahi ana i ngā aratohu raina: te ārai i te waikura, te pupuri i te taiao kia ma, te tāuta marie, me te tāuta tika i ngā taputapu.