Senate too happy

Just coming to the latter stages of my Julii 1.5 long campaign. It's about 197BC, I have 49 provinces and approval ratings of 5 for the senate and 10 for the plebs. I was hoping to have been outlawed by now but I've only ever had one threatening message about 15 turns ago (do X or your secret will be revealed). I did slow down my expansion and do a lot of senate missions quickly but was convinced the civil war was imminent and have parked about 6 full stacks in northern Italy.

Now I'm getting loads of reward missions again and my senate approval has climbed from 3 to 5. I know I could just finish the campaign in one turn by invading Rome, but that would be 'out of keeping' with the rest of the campaign. I want them to give me a reason to do so, a Ceasar-esque facade of legality if you will. So - aside from breaking relations on the other Roman Factions - what will get me outlawed the fastest? Move a few stack's out of Italy and go on an invasion spree in North Africa (the Scipii only took the Western side)? How about a few carefully targeted assassinations?

Hi Uriel,
A good, an often neglected anti-senate tactic, is to conquer more land away from where they set their missions. This makes them doubly frustrated, since the senate quite oddly begin to hate a faction should they begin gaining too much land.

As you have said, assassinations also can aid in the declaration of civil war, but they don't actually have any effect on the senate popularity rating. They just result in your faction being outlawed outright, as if you had attacked any province of another Roman, if your popular support is high enough (typically eight or more shields).

Hope this is useful, good luck!

Never got that far with them being happy usually about 35 provonces they are starting to hate me, id just assinate my way through.