How do i get into nightmare?

[Silver Fangs]

As the title, I have lv 70 builder huntress,apprentice,monk and squire and a lv 70 DPS huntress all those character have wearing lv 35+ godly armor, lv 50+ godly weapon and has giraffe.
I can finish 25 waves mix mod insance HC survivor game by myself so then I try to beat the nightmare difficulty.

Before that I did some work to know about the difference between nightmares and other difficulty such as spider shark and genie, character's DPS nef, apprentice's tower buff, huntress and monk's tower nef.

When I start playing I CAN BARELY BEAT THE DEEPER WELL BUT NOT FOUNDRIES AND FORGES !!!!!!!!!

I konw my gears isn't the greatest before I reach the nightmare, but it took lots of time farming a 21 ~ 25 wave mix mod survivor game and most of its drop isn't better than my present gear.

I do get a few myth gear from deeper well and mix mod, but it just a little bit better than my present gear and none of my character has reached the level 74 yet.

So if I have to farming hundreds of times the deeper well to beat the Foundries and Forges, and don't forget the deeper well isn't 100% drop myth gear, thats really ridiculous.
I really like this game, but If this the only way to play through the nightmare I'll rather quit...

[Johnnie Walker]

the gmae is kinda broken on the progression, farm endless spires nmhc the 1st wave to loot the treasure chests you'll get some low stats myth gear.

[ralphgod]

optionolly if u have tinkerers lab dlc u can try lab assault on easy

for exp u coud try tavern defense on hard or something it gives tons of exp

[FLOORSCRAPS]

Get to level 74 first doing Glitterhelm Insane HC. Then spend what mana you have on starting mythical gear in the shop. Alternative, you can get chest drops in Endless Spires on the second wave which often contains mythical gear.

[sphenik]

Endless Spires NMHC is the easiest way to get your first myth set, as for leveling up to 74 I'd suggest Aquanos Insane (HC if you can manage that). Even if you can't beat the boss I've found it to be the best XP grind for around your level.

[Mainman]

Here are a couple of guides regarding to the matter:
http://forums.dungeondefenders2.com/showthread.php?46488-The-Ryukaki-quot-Go-Bugger-Off-quot-1-78-Progression-Challenge
http://forums.dungeondefenders2.com/showthread.php?62607-Breaking-into-NM

If you haven't read these already, they will most likely be helpful :)