In terms of control/keyboard, whichever you find comfortable and faster to play with. In terms of line clears, beginner needs 30 lines per stage up until metamorphosis which is at 90. In both cases, the ideal run clears one double, and then only tetrises for the rest of the stage (you want to minimize the line clear delay as much as possible, and you clear more lines with tetrises). The double is there to make sure you don't "waste" any pieces placed, since lines don't carry over. (suppose you clear a triple and 7 tetrises, you clear 31 lines so you had to place 31 lines worth of pieces. but since the extra one line doesn't carry over, you "wasted" 2.5 pieces). If you're just starting out, try aiming for as many Tetrises as possible, then keep improving in speed.

quarter.zone is currently not in the process of collecting each mode's leaderboards for each platform and combining it to one, bitto dropped the project due to the difficulty of scraping some platforms