A few comments...
10: I would say don't do this, kind of dicks over people on your friends list since you wont be opening any of their cases. You can also use the Sr from gold/silver boxes to count for the daily quests (1 and 3 Srs).
11: I doubt any free player is gonna hit 230k without crazy luck on e-gatcha. You need at least two slayers r/sr slayers for that. Highest I got was around 90k with 1 r slayer in the Halloween gambit I think.

rest of the stuff is good advice though.