You could log in every other day to avoid gaining experience. Played like this for a while. But reached a point of being level 8, with high stat density and buying stat points was getting expensive (like 2.5k per). I couldn't afford anymore stat growth at a fast rate (PvP cash)
Not so sure anymore that being low level with high stat density is the best approach. Higher levels can get more cash from missions thus maximizing stats gains. The gap between you and the higher level is increasing at an alarming rate (even if no training trophies are involved)
Sure I get a smirk when an improperly trained level 50 goes splat when he PvPs me, but a level 50 doesn't do much when raising cash to buy stats, so no point in striking back