One of the joys of 4e Dungeons & Dragons is that the various tiers of play open the game up, changing the flavour subtly so that it always stays fresh. Recently my regular gaming group decided to try some epic tier Dungeon Delves. In fact, we decided to go for broke and take on the level 30 delve.
It was a blast and no where near as tough as I thought it would be, which is good because it increased my enjoyment factor.
Each of the tiers in 4e D&D adds an additional layer of complication to the game and as you can imagine the epic tier has highest level of difficulty. This is mainly because you have so many options. Not too many options, just lots of options.