Epic shroud. Add an epic difficulty to shroud. Level 30. Not normal hard elite, just epic. Don't epic the quests. Just add an epic difficulty to shroud. Keep the same raid, don't change it. It's nearly the best raid you have designed. Pump mobs, when harry dies a portal opens and all the bosses from devils drop in at once and kick your sorry behind. Not one boss, two bosses. ALL OF THEM. Make all of them teleport noobs to them too so the perch is not autowin.
Epic drops epic scales, epic bones etc. You use them in the new altar of annihilation to upgrade it to tier 4:epic tier. Tier 4 makes it +10, 2w, min level 20 and adds a single epic effect in relation to the shard combination used and two slots, red and orange or red and colorless. The min level 20 is to keep in touch with the idea that greensteel is tr weapon, so epic greensteel is etr weapon. The effects now: for example 3xPos adds to the effect improved disruption that stacks with the disruption already there. Epic ooze gets 1% summon avatar of jubilex in addition to the 1% regular puddings. Epic min2 makes keen 3 or 4. Epic lit2 adds desert sand (as per tumutulous) and so on.