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All those weaknesses lead back to Urza, Chief Artificer, but even ignoring the context of the 99, Urza is by far the most powerful option, and probably the second strongest commander introduced in artifact precons behind Shorikai
Chief Tui - Respected Leader has a very high ink cost of 7 to be played, but he has several benefits
There are also plenty of permanents that generate card draw, whether immediate or over time