How Valuable Are Senna's Wraiths?
**TLDR: 72.75 gold per wraith **
p.s. Lol people are correcting and expanding on my math now. That's perfectly fine, but my point was that she gets more than just 3 gold from wraiths. ... a lot more.
I posted this in someone else's question about why Senna got bonus gold per wraith. The answer to their question is that extra gold goes into purchasing marksman items, which are expensive. ... but this got me thinking about the gold value she gets from her passive, and this is what I came up with
Each wraith gives +1 AD, which is equal to 35 gold when compared to the cost of 1 Long Sword (+10 AD for 350g)
For every 20 wraiths, you get an additional 15% critical strike chance. Compared to 25% critical strike chance with a value of 800 gold, 20 stacks of Senna's passive gives an added value of 600 gold.
600 / 20 = 30g
Also, for every 20 wraiths, you gain +25 attack range.
Attack range is a difficult stat to give a gold value as there isn't a way to directly purchase it other than with Rapidfire Cannon, which doesn't give a range value on the lolwiki page. However, not accounting for the passive RFC is only 67% cost effective. So if the passive is considered to be the remainder of the gold value, it can be assumed that 35% of Senna's attack range is equal to 32.79% of RFC's total cost.
0.35 (600) = 210 range 0.3279 ( 2600g) = 852.4 gold
It takes 9 x 20 wraiths for Senna to exceed the range provided by RFC 180 = 225 range
So theoretically the gold value of RFC's passive can be divided by the number of wraiths needed to exceed the range to give the gold value of each wraith 854.2 / 9 = 94.9g per 20 wraiths 852.4 / 180 = 4.75g per wraith
So at a minimum, every wraith gives Senna 38 gold value (+3 flat gold +35 gold value of AD)
At 20 wraiths she gains an additional 600 (+15% critical strike chance) and 94.9 (+25 attack range) gold value on top of the 90 flat gold and 700 (+20 attack damage) gold value. That's 1454.9 gold per 20 wraiths.
If we were to just give her this value per stack and not work on the 20 wraith milestones, that's roughly 72.75 gold per wraith