Physic only exists as something to let scholars heal at low levels. It's a carry-over from the archanist base class and you should never use it as a summoner. You really do not need a propper heal as a DPS class. Almost all DPS classes can function just fine with just a few limited survival tools (yours is the titan shield). The only exception is RDM and they pay for it by having lower raid DPS.
You have other pets you can use. Otherwise just turn your pet on steady or pull mobs away before engaging like other classes do. Pre-50 solo content is not something that is hard enough to really be an issue anyway unless you are horribly under-geared.
While this is somewhat disappointing, you don't actually need a tank pet for anything (unless they haven't fixed some job quests). No other class has access to a pocket tank in duties and they get by just fine.
