My experience in case of malaria is quite good with CHINUM SULPH 30c when all the three stages are not very clearly expressed.
When pt comes after a day or two of taking anti-malarials the blood picture is also not positive & that is where in many cases IPECAC 30c works far better than CHIN.SULPH.I always support it with NATRUM SULPH 6x as a supportive medicine which helps in giving lot of comfort during the attack.