Sustained streams, my hits go off-sync past 6 notes. Groups of 4 eighth-notes, I'm too used to groups of 3 eighth-notes that the additional one at the end messes me up completely. Complex patterns of stacked notes Circles that are right after a spinner
my main weakness is background pictures and videos and that prrson jumping from the edge of the screen when you reach certain combo, thus I switched them all. Otherwise my eyes can't concentrate properly
airman patterns, stamina (only 2/3 of deathstream down so far cant even do freedom dive streams) and streams that stay on one spot and move to another stream on the spot
With my keyboard now, I can't do stacks or streams very well. If I had my normal computer with me it'd be high AR and small circles. They make a deadly combo.