Loosing the 30$ will not hurt my roll on Party. The game is higher variance, but massively more +EV than party.
by TAG/abc I guess you mean making standard raises with standard ranges according to position. That will get almost half the table to call, and I end up with TP in a 5-way pot. That doesn't seem too good. ABC poker includes c-betting when I miss. Why would I c-bet if I get called with 3rd pair?