Cannot really comment on template, but i guess in a group it could work well and would be fun to play. Something like 120 in mysticism, focus and archery, then healing,anat,tactics,med.
But try to come up with a suit first, it will be hard or expensive to fit all the dexxer and mage mods + decent stats if you use the traditional imbuing approach.Will need some ugly compromises then.
It may be possible now if you have a good selection of the new loot from shame or wrong to build something very decent in near every aspect.
When i was thinking about thrower/mystic i could not find enough advantages compared to traditional dexxer builds , but that was before the loot revamp.