It also comes down to what guitar and amp you're using. A distortion pedal to increase gain is perhaps the most useful pedal to make it heavier. The MT-2 may be the most obvious option but many players are also using the SD-1 or DS-1 for the same purpose.
In additon you might want to consider a compressor and possibly an EQ pedal. Personally I can't live without chorus no matter how heavy sound I'm dialling in. That could be just me though
HI khatz! Im also from the Philippines and we play Scremo. Our guitar players use XT-2 and SD-2. One of them used to play MT-2 but got tired of the sound. You can email me at gob.ramos@etelecare.com Thanks!