At lower levels, you should be able to "experiment" a bit and have fun, you could even co-tanking with arcanist and their pet, enjoy the diversity and work together with your group. SMN is quite versatile, Titan ego can actually be used as tank on some dungeons (aka WP) but will need some adjustment in play style from everyone in your party. This is a game, learn how to experiment and work together, you may be surprised on some results when you are thinking out of the box. Endgame tanking is different story lol....