Bonds of force vs atol's spectral shackles

[Ciksharn]

As a wiz I recently hit 51 and atols is now available over bonds of force as a quad snare. The p99 wiki has it listed as a 60% slow vs 55% on bonds of force. I'm wondering if there's anything else that im missing. It seems like a minor upgrade as I barley see resists on bonds of force. Also some guy tried charging me 2k for atols which seems absurd as I've bought a ton of other drop only spells for less than 100pp. Thanks in advance