That spine stuff is a bit subjective.
If you look at the traditional definition of the spine, it's really GK, CB, DM, AM, ST.
I much prefer a direct squad comparison... plus it takes longer and is geekier LOL
Cech - Lehmann
Szczesny - Almunia
Martinez - Fabianski
Debuchy - Sagna (experience)
Bellerin - Eboue
Gibbs - Clichy (experience)
Monreal - Traore
Mertesacker - Toure
Koscielny - Gallas
Gabriel - Senderos
Chambers - Djourou
Coquelin - Flamini
Arteta - Gilberto
Ramsey - Diaby
Wilshere - Denilson
Cazorla - Rosicky
Ox - Walcott (experience)
Rosicky - Hleb
Ozil - Fabregas
Walcott - Bendtner
Sanchez - van Persie (experience)
Welbeck - Eduardo
Giroud - Adebayor
So I count 14 - 3 in favour of our current squad, with 6 'draws'.
Where I have put '(experience)' means the age should be taken into account. E.g. Sagna was 25 in 2008, and in and out of the French side, whereas Debuchy is 29 now and first choice for France. van Persie was injury-prone and not yet the world class force we saw from 2010 onwards.
I left Giroud/Adebayor as a draw but I guess most would pick Adebayor. He did score 30 goals in 07/08, but all his other arsenal seasons were bettered easily by Giroud. We have more goals coming from elsewhere now, so we don't need a 30 goal forward, and Giroud provides a lot more assists than Adebayor did. Still, if you award that to Adebayor, then the score is still 14-4.
No doubting our squad is pretty awesome now.