For the sake of reporting bugs I thought I would add these to this thread, I can't recall if they've been addressed before but I thought I'd give it a go since although they're minor, they should be handled.
Pulling at The Blazing Flame
After summoning this boss, you can wait for him to spawn his minions, then drag the minions up or down until they despawn, resulting in the boss resetting with the minions on cooldown, making the fight much easier as you only have to face one set of minions (depending on how fast you take him down) instead of the intended first group + backups. If it's possible, make this boss, all other bosses and all future bosses reset all their cooldowns when they themselves reset to keep the challenge at what it's meant to be.
Turning in gaias 2 after the skill has been bought
A very minor bug but you don't actually have to complete this quest to get the skill. You're able to purchase the Gaias 2 related 5k skills by talking to the oracle after visiting the sewers, then buying the skill, without finishing the quest (i.e talking to Colonel Brightblade). Just thought it might be worth changing for future versions.
Blocking The Lieutenant with 5 on bridge
This I've only recently seen and although amusing, it's possible to block The Lieutenant from gaspode by lining 5 players up on the bridge, or by moving gaspode into a small fenced off area in the bottom right corner of the 'defence grounds' and preventing him attacking at all. Maybe give The Lieutenant phasing of some kind to prevent him colliding with characters and making this challenging fight extremely easy.
Skeletons recieving perm stun sometimes
I saw this when performing said blockage, the lieutenant eventually did manage to get a stun off and it stunned all skeletons permanently. It may be because gaspode died immediately after, I'm not sure I haven't had the chance to replicate the bug yet but some summons may get permanently stunned somehow.
Shade doppel xp
On killing shade, all doppels die, granting xp equivalent to that of Lady, per doppel. This should probably be fixed unless it's intentional. If it is, it makes getting 37 extremely bloody easy as that's like one d3 boss and 5 ladies in some instances, depending on how fast the boss goes down ofc.
Stunning Andrazzars Shadowbolt with Shield Slam
Another minor bug, although it may be intentional, because shield slam pushes Lord Andrazzar back slightly, this stuns him, breaking the cast for his random target shadowbolt. Shield slam is the only stun to do this I believe, I haven't tested sin related stuns yet though.