Well, I can tell you somethings wrong if you started with 4k chips and that blind structure if you only won 3 pots the whole game..
Ya, I would say 6 and under is a bit tight, even for a tournament. YOu do want to play tighter in a tournament than a cash game obviously, and to some extent it ca be equated to a holdem tournament where you want to avoid "coinflips". But you also can't assume everytime someone has a lower card they have the nuts. I mean if u have 238, u look around and an ace raises, another ace reraises and a 3 calls, ya, you obviously dont have the best hand ina spot like that. But if u have that same 238, esp. if the 8 isnt showing, and u look around and see a 2,3 fold, and only 2-3 more low cards, bet that. You have a good hand, if not the best hand. An important thing in razz is not just your hand, but if the cards that make your hand are still "live" If you have a23, and the other people have a 4,5,4,5,6,7 and a 7 showing, u actually have a pretty weak hand, even though in normal circumstances it's a strong one, just because all the cards you need to make your hand are already in play. Now, that's a pretty extreme example there, EVERY single card to make your hand wont usually be gone lol, but I'm just trying to make a point. it's especially important in tournies.
Now the other thing, and this takes practice, is playing your opponent. A lot of people think razz is just a luck based game, and in part that's true. if the guy has a 2345 board, and u have KKJJa24, you can't just go all in and bluff him out like you could in a game like holdem. Razz is a high variance game, and sometimes, tournaments in particular, you just can't make a hand. But one thing you can do, is to realize who plays poorly and who doesn't. If you get 3 decent cards, say an a47, and u bet, and a guy with a 5 raises. the logical assumption is he wouldn't raise unless he had a better hand than your 3 to a 7, but say this guy is playing every hand, or a lot of hands, and raising marginal hands a lot, well in that spot, chances are you have the best hand, or at the very worst a very close hand.
So you just need to pay attention to the kinds of hands ppl are playing, and also how they play them. Say in that spot I know it's a good player, well I probably wont reraise them, for 2 reasons: 1, he actually could have a better hand, in fact likely does. 2: he's not going to play poorly post 3rd. What I mean by that is, say you just call his raise, and hit an ace, he hits a 9. then u hit a 6, he hits an 8. well a good player probably wont call in that spot. a bad player will, especially for a raise, since he thinks he has "pot odds
" even though it's a misapplication of it.
so in general, the worse I feel someone plays, the worse a starting hand I'll play. Not bad hands, but marginal hands like 92a vs an 8 showing, because I know if i hit good on 4th he's going to call, so you're getting great implied odds off a guy like this, not to mention against a guy who plays too many hands you may have the best hand anyway.
so anyway, that's all just my opinion, what's worked for me, you're welcomee to take it or leave it, hope it helps