Is there a plugin or botbase to follow my party leader when ever he is in los? Also attack the same target as him. Just like with dungeon buddy, but not in dungeons.
LazyRaider can do this (using leader plugin on the "leader"). It is a bit touchy about setup (my exp.) but once you get it down it serves the purpose.
Edit: Sorry I just re-read and noticed that you said that the leader is not using HB. In that case I do not know of anything current that will do that. FPSWares Rafbot used to do what you are looking for, but I am not sure if there is still a current workaround to get it running or not. You may be able to ask around for a working version of it from the users though as I believe FPS is MIA.
? There's a plugin to follow and loot but no attack on the forums here.
But if you can pay for TuanHa full package etc surely upgrading to 3 sessions is no big deal? Just do that and Partybot... HB has the features you want, pay for it. It's not like it "runs out", best money i've spent.
Stupidest thing i've heard, you will not get banned for having party bot leader on your main, the bot is not doing anything for your main, hence it's not against the rules. There's no difference in what blizz sees if you use partybot or no partybot, you still have a bot following your main.