The problem with wardens is that upgrades and rares give them so many more options and possibilities (i.e. chaos power, ragepots without buffs, SoP).
If you can afford upgrades, I've been using this deck pretty successfully as a pvp rush killer:
However, the problem with this (besides reverse time) is that you need the snovas, CPs and pendulums upped (and ideally the wardens and blessings as well) for it to be effective.
Anyhow, upgrades aside, if you do manage to get some shards of patience, they work very well in a life duo with mitosis and empathetic bonds.
Rares aside, you might want to try this:
Hover over cards for details, click for permalink
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It's been working pretty well for me, and it's remarkably stable for a trio. Use all your buffs on one warden (unless you suspect reverse time), killing all ground-dwellers with it, and use all extra wardens to delay enemy flyers. This means you can damage the enemy while you have the field locked down. Angels are for healing up your wardens and ragepots are some good extra CC if there are too many enemy flyers.