bankai

i'm just a little confused what these 2 terms mean. I know reiatsu is the total of your stats; your overall "might", and connection is related to shikai/ bankai, i don't know why they're listed seperately. i mean i thought you unlocked new levels of connection at 1,000 and 15,000 rei...

1. why can't you play as an arrancar? they are SOOOOO awesome! 2.what level of reiatsu is considered"captain class?" 3. what do you need to do to achive bankai?*:o: 4.around what skill level can certain fights start becoming"easy"? 5.are we allowed to have weird sealed zanpakuto(ie...