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You average 6.7 CS per minute as Mid; Master players average about 7.8. Every 15 CS is roughly a kill worth of gold. Practise last-hitting under tower, shove the wave before recalling, and catch side waves between fights instead of standing in lane doing nothing.
From the fourth game of a session onwards you win 40%, compared with 83% in the first three. Fatigue is invisible from the inside — play in blocks of three and take a real break.
You take part in 46% of your team's kills; Master players average 60%. After your first item, look to rotate for dragon, grubs and herald, and keep Teleport for fights rather than for farming.
1.9 solo kills per game — you win 1v1s. Use that threat to draw the enemy jungler to your lane and free up the rest of the map.
Katarina: 3 wins in 5 games (60%). When you need LP, this is the pick — climbing is easier on a champion you win with than on a "stronger" one you don't.
