if you solo more then group activity go SK as that class has more DPS and as long as you don't go to real hard spots you should lvl a lil faster that way
TK has stronger defense but on your game style that sounds not needed imo
On my view Shillien templar, even in mass pvp without such cubes for heal, mp, make coffe xD turn on iron aura, knight, focus shield and done, a bit decent con, bum! u have the necessary for "the defensive tanker style" when the situation ask for it, and when u wanna kill people, u can nerf their p.def, m.def, atk speed, paralyze.... :D
improved shield defense, hold and full hp/cp/mp revival after death is a very good choice too (the revival comes in the next update btw)
evas templar for now dont make much sense (defense rate is useless and cubics heal power is bullcrap), but they get another cubic for +speed and a skill for debuff immunity in the next update, doesn't say anything of how it works tho, if it is a passive they are going to be completely OP for sure