The trygon Tezz/jace whatever you want to call it matchup with dark times is nearly as good as the Dredge matchup.
Just sayin'

Edit: I realize that is probably a controversial claim But my evidence to support would be this: I haven't lost to a jace deck in my last 4 Vintage Events, And only lost to one David Ochoa in the event before that (finals of a vintage 8 man at GP columbus).  My losses with dark times in the last 4 events have been as follows:
Workshops
Workshops
Bomberman
Workshops
Fish
I still believe the shop matchup can be brought to an acceptable level with the proper sideboard and I have been feverishly experimenting.  Since I changed sideboards, Im 2-2 against shops in "serious" matches.  I haven't lost to dredge in the last 9 months so there's that.

As a lover of TPS, I can unfortuantely say that Storm combo is pretty much the nut low right now unless your meta is for some reason devoid of the Shop infestation that is everywhere else. While Dark Times is not a "Shopkiller", it does have a much better matchup then Storm based decks do.

Or actually playing the deck

Hey man, if you like Dark Times, run it, no one reasonable is going to argue with you there - but if you want to know what we would play, I would guess you're not going to get a lot of "Dark Times" as your answer.

Myself, I'd seriously question the assumption "Destroying your opponents plans before worrying about winning is a very effective strategy," but again, if you just enjoy the game more that way, who are we to stop you!

What are you asking when you say "Does anyone have an opinion on the resiliency of deck win conditions? e.g. Tendrils (storm)/MUD Lock/Tezzeret, Vault and Key" ?  I'm not sure I follow.

An intelligent answer to this question would require a much more detialed understanding of the tournament you were going to attend:

- It is Sanctioned or Proxy? If proxy, what is the proxy limit?
- Is it a well developed metagame, or are most of the players new to the format?
- If  is a developed metagame, what decks are prevailent? Does anyone play Dredge? do people skimp on hate, or even avoid it alltogether? Are there people there that own (or proxy) Workshop decks?
-What was the Top 8 like at the last event in this area? Who are the ringers and what do they like to play?
-Am I better, equal to, one of, or worse than the local ringers?

Once all these factors were taken into consideration, a decision could be made. As an example, locally I am one of the top 4 players in the store when it comes to Vintage. No one owns Workshops or enought stuff to proxy out a Shop deck. i tend to play storm decks- my natural predator is missing, I don;t mind playing a skill-intensive deck since most of the plays will be less skilled than I am, and it slaughters random decks when do tned to show up alot. However, when going to a larger Vintage event out of city, there are a reasonable number of players who are better than I am. Many of them play dredge. Others play Oath. thre are lots of shops though I don;t think many brilliant shop pilots. If I were to go to one of these events, I'd be packing something like Dark Times with Green splash. Having an edge aganst the pros who show up with Dredge is a good thing.

to make a long story short, you need to put more thought into your question. Sure you could just say you'll show up with the sickest MUD list ever, only to find out that everyone is packing 4 Trigons and 4 Nature's claims maindeck, with 4 Hurkyl's out of the Board. Questions like this are useless in a vaccum.