Rework Frozen Mallet

Recipe reworked into something reasonable.
Now Gives
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800 hp
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20% Tenacity
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Basic attacks slow enemy champions by 40% for 1.5 seconds. Can not be proc'd on same champion more than once per 2 second.
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Maybe give it the point runner passive to if its under powered??
Basically swapped damage for tenacity. Made it more tank/bruiser centric. Removed any real reason for an adc to get it (prime reason i believe it's left in its current state)
Thoughts?