I'm fairly happy with the way prestige is building up but still nervous about how much I will need for 44/45.
MESSINA
20229pp, 23 slots.
Triumph requires clearing 15, yes 15

, minefields. This is what the engineers are along for. I overstrengthed all 3 engineers and the Sherman Crab to 12 as they will inevitably take damage clearing mines and preloading them like this should delay or even avoid taking replacements during the scenario.
The trick to this one is that some Axis units withdraw and can be let go and some have to be destroyed.
Initial battles on the ground went well, however in the air was a different story. After taking out the initial Italian air units I attempted to hit the Tiger in the south with a B-24, not picking up that there was a mobile AA adjacent. Then a FW190a attacked the escorting P-47 for 5 damage each. A defensive and then an attacking round of AA fire left the B-24 at 4 str. Not wanting to spend that much prestige I had to park both of those air units for the rest of the scenario.
On the ground things went better. Good progress in the north and in the south the Tiger moved into the town of Randazzo to attack one of my engineers (3 damage). Attacks by the two available engineers destroyed the Tiger.
On turn 9 my units cleared the last of the 15 minefields on the map and on turn 10 destroyed the last Axis units on Sicily, including the supply dump north of Messina. Destroying the supply dump triggered getting an Italian volunteer unit (an alpini with 200 exp and an A+2, D+2, I+2, M+1, S+2 hero) on turn 11. Not getting prestige per turn so occupied Messina for a Triumph, 20269pp.
Verdict: Not as easy as it sounds, you can get bogged down in the south. I was fortunate to destroy the AA unit here before it could withdraw and air support made all the difference to the advance in that sector.