IMO ToC10/25 is harder than ICC10/25 (Lower Spire) at this point. With the ICC buff up to 30% now you can pretty much ignore the majority of the boss mechanics in Lower Spire and still clear it successfully. ToC is much less forgiving on the mechanics. Even once you get past Lower spire you can still ignore a lot of the mechanics in the fights and still have some success. The DPS check on festergut should really be pretty easy. With enough dps you can get rotface down before the fight really becomes hectic and is pretty easy. On Blood Princes the only mechanic the entire raid really needs to worry about is the empowered shock vortex. The rest only need a couple competent people to handle.