Quoted from Bmanpin:

Score! Here’s to keeping the economy going!

Quoted from Supersquid:

Congrats. It's an all timer. 1 suggestion, get spots to light the center play field. Easier to see the ball and can appreciate the awesome artwork.

Quoted from Aflacjack:

I have spotlights in mine and the pics are just up there if you want a reference.

Quoted from Supersquid:

They should be #44 bayonet sockets. I like the 2smd frosted ones from Comet. Personally, I changed them all to the frosted sunlight ones and it looks great.

Quoted from PinMonk:

You can collect the mummy card pretty easily by spamming the upper right spinner, then hitting the captive ball, rinse, repeat. Makes it really easy to collect that card.

Quoted from Gogdog:

Here you go ->
http://tiltforums.com/t/iron-maiden-pinball-rulesheet-wip/3787

Quoted from metallik:

Shoot for flashing orange Xs to qualify playfield multipliers. As soon as you get a mode or multiball going, shoot a ramp to feed the inlane to start the multiplier. Learn the mode rules so you can complete the objectives, then be ready to shoot the bullseye to collect the soulshard as soon as the mode ends.

Quoted from PinKopf:

Not that I'm much of a player, but my standard strategy for the game is pretty basic - always time collecting Eddie letters and lighting locks to always start a single-ball mode having Mummy and Trooper ready to go. Standard mode stack with MB. Try to avoid ever starting either MB without a stack.
If you do start either MB without a stack, make sure you concentrate on getting at least one super jackpot to light the card. If you can get control and have the add-a-balls ready to go you can take jackpots or go for power feature shots, which for me usually means ramps.
Speaking of Mummy, I usually shoot for the captive ball from the upper left flipper at most opportunities to get it lit. I also like to deliberately make glancing hits on the captive ball from the lower right flipper, roll up into the orbit, where it will often stall and roll back down allowing an upper left flipper shot on the Mummy captive ball again - two hits for the risk of one really. If you have both Mummy and Trooper lit, that same glancing shot will start a 4 ball trooper instead of 3 too, leaving Mummy still lit for after.
When in Rime or Aces I'll go for their jackpots during ball save, with an eye toward ramps again. Also pay attention to having or lighting the mystery award before/during these modes, as you need those add-a-ball awards. Getting control and knocking out ramps with one ball will really move you toward Cyborg with less risk. Honestly I rarely make many points with either of those MBs directly, but progress toward other goals is worth something too.
Obviously try to juggle the multiplier light and only start 2x/3x to coincide with a mode/MB too.
I guess great players probably avoid shooting for loops generally, but when appropriate you can make some huge points with loop jackpots. You need to have hit a few loops back-to-back during the build-up to the loop jackpot though, if you haven't already do read how that loop value works. Plus nailing loops in a row is probably the greatest thing in pinball, LOL.
All in all though the key to this game is control. Work on your drop catches and dead bounces at the very least and avoid flailing. If you're struggling to break a few hundred million regularly you're almost assuredly playing too out of control and/or not shooting for the "correct" shots risk vs reward wise.