I wonder if an appropriately placed Balac could could halt the FaShih strategy. Perhaps flank with the the Balac(s) and rush up the middle with Arnis and whatever other fast 'Mechs you can afford to use. Maybe even load up a Garrot Transport with a few well picked infantry (your on FaShih and an anti-pers SC Shock trooper or SS Fenrir). Then you just have to deal whatever support ArtyWarrior chooses to use. Hopefully the infantry in the Garrot could tie this unit(s) down.

I think may the SC Shochwave is good start point to run with Arnis and help pulse very other turn at an arty and killing it. bUt then again with the now scenrio rules your see more cheese. so I think may some LI ATV will work as well.

I don't think infantry can't really tie down the Fa Shih. I believe grapple is only negated by a second opposing vehicle or mech in base contact with the grappler, not another infantry. Or if you mean somehow base the Fa Shih before he bases you, they all have JJ so breaks are usually not a problem.

I guess you could use a Sprint to free up Arnis. You'd still have to make the normal break roll though. Not to mention you're using two orders and doing one click of damage while your opponent is still merrily pogging away at your support.

By the way, I'd like to add I'm not trying to piss all over your thread or anything. I like the idea of evade mechs against artillery, although I've never play-tested it or anything. I'm just trying to point out likely responses to your scenarios.