For those of you saying BotRK needs buffs...
AD is worth about 36 gold each because
is 360 gold and 10 AD and 360/10 = 36 per AD. BotRK essentially adds AD of a variable amount.
It's so gold efficient at all percentages of HP that it's not even funny. Let's take a 2000 HP squishy target. 100% HP - 160 damage per attack or 5760 gold's worth. 75% HP - 120 damage per attack or 4320 gold's worth. 50% HP - 80 damage per attack or 2880 gold's worth. 25% HP - 40 damage per attack or 1440 gold's worth. And nobody think's Wit's End needs buffs? BotRK deals more damage than Wit's End all the way down to 25% HP.
Now let's look at a healthier target (Sejuani, 6000 HP) 100% HP - 480 damage per attack or 17280 gold's worth. 75% HP - 360 damage per attack or 12960 gold's worth. 50% HP - 240 damage per attack or 8640 gold's worth. 25% HP - 120 damage per attack or 4320 gold's worth.
If you think Sejuani is OP then just get a
.
is NOTHING compared to this.