forum sfg

i joined forum sfg this year after flunking prelims, got around 110-112 in essay (2), and 70-80 in GS papers. (65ish in GS1). ig i can score 75-80 if i attempt all questions but I'll have to go 100+ to make it, is it doable? considering now I'll not be writing much answers due to prelims prep so is it possible to go from 75-80ish to 100 in a year? i mean in few months bw pre and mains