First step was DamageInfo. Step by step cmangos has looked like a R2.
And now, when i ported all good systems from R2:
Group System v2 with multi invites (with right check on groups)
Transport, MOTransport, Vehicle, VehicleKit systems
Spell system and SpellAura system
RustEmu it's R2 on boost
Just wanna to say : Thank U MangosR2