Been levelling a toon based on this build recently. Just hit lvl 46 and proving to be very robust.
Made a couple of slight changes :
- Don't need LSA Discipline (a class feat already) so went for ESF Perform (even +50 equip is cutting my song off low) - Dropped Lore and put points into Listen for extra offence
Also debating whether to drop the 2 X Grt DEX in LLs and replace by GWF and Epic Prowess. Will drop 1 reflex save (no problem there) and 1 AC (will probably end up mid 130s in BUR gear) whilst gaining 2AB - taking the build to 89 AB by my calculations.