What is the best type of government?

[Valion]

For you'r homeland region? currently playing Romani at Vh/M and it's been only 2 years and i've already captured Taras, Rhegion and Segesta.... currently seing that "homeland" is available i shouldn't bother with the lv 4 government rather the longer but in a long term better lv1. so seeing my experience with EB isnt that much yet i was wondering if this decision of mine is good. I like to micro my game so currently the unrest and culture penalties are relaxing even at my standard High tax rate and few garrisons.

Also another thing unrelated to the topic - are mercenaries worth recruiting? i like to form my armies like they were in the past even with the absurdly high cost of mercs.

Thanks and Cheers!