EStar2 requires getting to Schindylrin. That will be unpopular and our only tour guide is likely to be JM. JM and I ran the entire series a while back (actually did eWheloon and eHorns and whatever else and cashed in that one huge saga for a buttload of XP) and it wasn't too bad for lag although it was just the two of us running.
It's that 23-27 range where it gets really thin content-wise.
We've actually done a lot of the epic-only stuff on our alt group in the past couple months (Sable, Haunted Halls, Don't Drink). One thing we did skip is Thunderholme although that's lvl30 so it would be a good while before we'd want to take that swing. There's not much there but it would be something reasonably novel for most of us if we wanted to give it a spin.
It's not just thin, it's all old content that's been epicfied. Those few non-heroic ones are pretty high up in the epic range.
L20 is weak, with Lord of Blades, Tower of Despair, and the Dreaming Dark being the last Heroic quests (non Epic, but L20 on Normal), and Carnival and Sentinels packs. Neither with particularly decent gear, though the latter has a saga. I think we skipped both this life, so probably on tap. I thought Master Artificer was 20, but apparently it's 19. I don't think we'll get to the flagging content for either raid or Dreaming Dark before hitting 20, even with Corwin lagging behind. I think I'm less than 2 ranks away myself. 8 Epic quests, with three non-Epic 20's that we probably won't be flagged for.
L21 is actually heavy, with VoN 1 and 2, Keep, MotU 1, Web of Chaos (spinner), Red Fens, 2 White Plume quests, DA, Chrono, and a couple of F2P quests tying into expansions (MotU and Dread Sea respectively). Plus Spies, and Offering of Blood; 24 quests total.
15 quests are at L22; MotU part 2 (Shindy, everyone's favorite), the two EStar stand alones, the rest of VoN including the raid, rest of Desert epics including the raid and preraid, and the last Keep quest. Depending on what we do we may be okay, since VoN has a ton of XP and Desert is no slouch.
L23 has 1 Feywild quest not available at Heroic, Hunt or be Hunted, Druids Deep (also not anyone's favorite), Catacombs (definitely not anyone's favorite) 1 White Plume, and MotU 3. 18 total, but 16 are MotU, Catacombs, and Druids Deep. So basically only two quests we really want to do, and one of those is unknown really. Gonna have to do something here no one likes.
L24 has 16, most in GH. In fact only Caught in the Lag Spikes (MotU Raid, so undesirable) and High Road (poor XP and loot) aren't GH, which accounts for 10 of the L24 set. It's better than...
L25, which has 7; 5 in Three Barrel Cove, Fall of Truth raid (which we've done) and the prison quest from White Plume (which no one wants to do.) L25 is weak. So we're going to have to load up on earlier chains to compensate, or run S/E/R or run under level. Here's where having to bank from earlier in going to come into play. There's just not enough content here.
L26 isn't much better at 9, with Wheloon , Study in Sable, and the third Madness chain being it. Not much other than Sable we care for, but not much choice; because...
L27 only has 10 itself, although 5 of the 10 are Delera's Tomb. Because we love it so much. Rest is Stormhorns, and the F2P Morgrave quest in Blistering Heights.
L28 is pathetic with 3, Haunted Halls, Brothers of the Forge, and Tower of Frost.
L29 only has Necro 4 Epic. 4 quests.
L30 has 14 with Grim and Barrett chain, Thunderholme, Archons + Raid, Necro 4 raid, and Mask of Deception.
L31 on has a ton of stuff, with RL, Sharn, LVale, LHound, LVision, Dread Sea, Tethymar, Rage, Feywild, Planar Eyes, etc... most newer content is stuffed into L31-34.
So once we're 30, it's not an issue, but to get there, we're either going to grind some dailies, or run some stuff we don't care for. Flip side of that is Corwin and Alrik may well get the 5k favor they need for free tomes, and if we chose to run faster raids we may get some loot. Of all Epic and Legendary quests, 36 are not available in heroic; most are raids. We could probably call upon some of our allied guildies to fill out raid groups; and let Gat solo them for us.
Though looking at it, it's clear than SSG really needs to pad out the epic levels before pumping more L content, though they probably won't. It'd be fine if they had E and L versions of the quests, as long as there's some padding from L24 and especially 25 up to 29.