Guitar amp settings help?

Im trying to learn some new stuff on guitar but my amp sounds horrible. I have an ibanez rg and an epiphone studio-10EQx practice amp. My amp only has volume,treble,b and middle knobs. I usually play blink 182 stuff so what should i set my knobs to?and im also trying to learn some heavier stuff like the devil wears prada and lamb of god so what can i set my knobs to for heavier music?