Sure. Remember that most .60 sized airplanes ever built used a single standard servo with maybe 45 ounces of torque on the elevator, with no problems. I routinely flew a fourteen pound Byron Sabre with just one standard servo on the elevator. Lately, I have been going for more smaller servos. I have two miniservos on the ailerons of an ME110.
The only downside to the miniservos is they only have two mounting screws, so you need to be careful that you do a good job installing them.
You can also use a 6v receiver pack to make them more powerful.
The thing is...if you want REALLY precision control, you need to use better quality servos, whether they are standards or minis. There IS a difference. The plane will feel sharper and nicer with better servos. But, you pays your money and you takes your chances.
But...I do not think you will have any problems with the two hitecs on the elevator, it should be better than a single standard and the long pushrod.