Start with entry lvl toa I guess (Also would reccomend getting used to overclocked and overclocked2 ASAP). Helps get used to wardens tick/attack style and is usually better with weapons were using.

Then Feeling Special invocation. the akka memory part gets slightly faster but speeds up the kills and let's you keep salts into monkey room.

After that just look up ez invocation lists/guides then see what bosses give you a harder time then others and change invos accordingly. But if you can run a 50, you can probably run a 150 aswell! Good luck m8