I've seen merges like that in similar situations (I don't fly 109s), and having flown Spits (the "V" mostly) in the MA I know better than to try something right away. Maybe if someone shows me another way to defeat that then I'll learn it. I think some people do know better ways, but I've never seen much about it.
A couple nights ago in the CT I kept running into a trio of Spits about co-alt with me. Sometimes there was a fellow axis nearby, sometimes they were all lower. I went at them... one of them went straight up on the merge. I just blew on by and watched the high one. It Immelmanned and came down on me. Fortunately I had not bothered to bleed my speed and a couple light jinks later I was out of gun range. Boring sure, but if they want easy targets they're not going to get it.
Given that the newbie to vet ratio in the CT tends to be lower, I'd be even more wary of trying to turn fight Spits in the A5, unless I'm not in the rtb mode.
mauser