Anti tank mines from both sides are great against tanks, about as effective as Teller mines. Russian AT mines counter infantry too, with mixed results though never a bad idea if you are floating muni. German S (anti personnel) minefield takes way too long to construct, but its effects are comparable to PE sector artillery if there isn't a minesweeper nearby. However tanks can plow through the S minefield and take almost no damage.
Thanks Marcus for your input. The problem that I had was that I was not maintaining map control because I was bleeding manpower. Also, it's probably true that I could have used my FHT to better effect, but was worried that he had an AT/mine laying around. GG Seb!