Casual U/R Lockdown

[rcg1205]

So, I'm new here, but I've been playing for awhile and like to think that I know a bit about the game (feel free to tell me I'm wrong, I'm pretty used to it ) But I'm trying to give people in my playgroup an introduction to some of the various 'archtypes' of decks (Combo, Aggro, etc).  So at the moment, I'm trying to show them what a prison deck is and try to teach them to play it.  So I took a look at a few Stax decks in Vintage and a few attempts at prison decks in legacy, and came up with the following list:

4 Seat of the Synod
4 Great Furnace
2 Polluted Delta
1 Bloodstained Mire
2 Volcanic Island
4 Ancient Tomb
2 Barbarian Ring
1 Strip Mine
2 Chrome Mox
1 Sol Ring
1 Mana Vault
1 Grim Monolith
1 Voltaic Key

4 Smokestack
4 Tanglewire
4 Trinisphere
4 Sphere of Resistance
2 Crucible of Worlds
3 Sensei's Divining Top
1 Karn, Silver Golem
2 Triskelion

1 Tinker
3 Meditate
4 Goblin Welder

I'm looking for any kind of suggestions you guys have to suggest.  Maybe Uba Masks deserve spots over some of the 8 spheres?  I think that 8 is a bit much but I'm not sure what to take out for other cards.  I really appreciate any kind of suggestions you can offer, thanks in advance.

[dandan]

As Trinisphere is restricted in Vintage, 4 might be seen as 'unfun'. You might want to highlight some other cards used in Prison:

Sundering Titan
Thirst for Knowledge
Brainstorm
Uba Mask
Memory Jar

spring to mind

I'm not a fan of Voltaic Key or Meditate either, I'd much rather have Brainstorm and Thirst in those slots (not a combo with Mask though!).

Unless people don't like playing Wastelands, I would always want some Basic lands. This has the added benefit of making your Fetchlands work!!

If you are running 2 Crucibles, you should have at least one Wasteland, that Strip Mine is lonely!

There look far too few Chrome Mox targets to run 2, I'd run 0. If you need acceleration, there are a number of other artifacts you could use instead.

[xycsoscyx]

Yeah, I'm confused what format you are aiming for?  Even in casual, it seems that a lot of people prefer to keep it either Vintage or Legacy (or some Block) legal.  If you just want broken, 4x Sol Ring, 4x Grim Monolith, 4x Voltaic Key!  XD  Else, 1x each, 1x Chrome Mox ('cause it's Vintage restricted), or 0x 'cause, like dandan said, you don't have enough targets to really imprint it.  4x Trinisphere is a nono unless you want to venture into Legacy legal, but 4x Sphere of Resistance works wonders in casual play.