If you don't want a superstar TE, K, and DEF, take them with your last few picks. There's no point in wasting a good pick on a crappy player who will get you fewer points than good WR's, QB's, or even reserve RB's.
If you want the best, you do have to pay a little more for them. Insane people will take Tony Gonzalez in the beginning of the 3rd round, but mainly by the 4th round he'll be gone which is fine. He produces as much as a top 20 WR. Heap and Shockey will come next, but they really shouldn't be taken until the 5th or 6th round. After those three, just pick one near the end and pray they do good...
Defense - NE and BAL are going to require about a 6th or 7th round pick. After that, you can get a very serviceable defense a few rounds later.
Kickers like Vanderjagt and probably Wilkins (due to his perfomance last year) will go later than the top TE's and defenses, probably 7th or 8th round. Unless you're using a strategy of taking all the best non-RB's at every position, don't waste a higher pick on kickers. I guarantee there will be at least one or two kickers that are either undrafted or let go after the draft that end up in the top 10 in kicker scoring. Last year I let Wilkins go after the draft, picked him back up in the eighth week, and never looked back.
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