This is actually something which I would recommend not doing. In a 1 vs 1 scenario your infantry is inferior to Sections, so taking fights all over the map is the last thing you want to do, as every battle will turn into a MP bleed for you.
To OP: Don't do this. Don't stall for Luchs as OKW when facing UKF.
UKF gets AEC after 85 fuel( 30 + 15 + 60 - 20 ) , while OKW gets Luchs after 110 fuel ( 15 + 45+ 60 - 10 ) . By the time you can get Luchs your enemy will have a AEC on the field. Instead go for Puma ( if you go for Mech. HQ at all ) , since Puma will at least keep the AEC tamed down.
Also going for Mech. HQ means that you get Panzerfausts later than with Battlegroup and also don't have ammo free healing, which will make upgrading to Stgs even harder.
I also would not recommend getting a MG 34 unless there is a really well positioned house on the map ... and even then I would rather spend the MP on something else.
Leig is pretty much the only viable advice here. But remember to get 2 of them. One will mostly just bleed a bit of HP.
IS is superior to volks pretty much the whole match. Except when UKF player doesn't go for 5 men / MG , while the OKW player gets STGs on his Volks.
All over the map doesnt have to mean 1vs1. One squad can stall from green cover until next one arrives and either flanks or they zerg rush together.
Agree that Puma is better than Luchs though
The 34 can hardly go wrong against 4 IS build assuming its properly used
Also I must add one thing to my advice, although that applies to all factions and matchups rather than just OKW, but: focus on capping more than on combat, which kinda connects to the first point: even if he gets ahead MP wise, it will make map-control pure hell for them