Yeah, Frosties are phenomenal. I was working with what I had painted in making the list. That said, I do have a phoenix NIB that I should probably assemble for pickup games/local tournies.
I get the lack of a hammer bit - The chariots can turn into a brick of Swordmasters/WL's if needed... Or I can run one unit of PG and beef it up a bit as well as take a lvl2 mage for support.
The list I posted is not the most competitive but I do believe that it would be fun to play and play against. My thoughts on the lion chariots would be to flank the PG in order to offer a stubborn wall, as well as having the bonus of adding a handful of impact hits.
In regards to the Silverhelm bus, I much prefer it being used with DPs ... the Prince/noble ride along and a mage of somesort ends up in the 2nd rank of the unit, stacking ward saves onto the unit. The term "all of your eggs in one basket" barely contains the points sink that is this unit, however. The core would be reavers/archers to offer some combined arms... or you run a unit of spears and a wayshard hero in order to ambush/flank whatever the bus hits.