If you go on that path, catapult would be a good choice to get you past shields. However, mixing in three elements can get to be pretty tricky quanta-wise.
One thing I will say is that sundial doesn't do a lot for you, since every turn you defend with it is a turn that you're not attacking. It would be better if you used something else for defense, either reverse time or dimensional shield. If you go with the latter, then you'll need to re-tweak your quanta balance.
Here's a deck that Team Time used in the last War:
For you, it might look something like:
Hover over cards for details, click for permalink
5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rl 5rl 5rl 5rl 5ro 5ru 5ru 5t2 5t2 5t2 5t2 5t2 5t2 5t2 5t2 5t2 5t2 61t 61t 61t 61t 61t 61t 622 622 8pu