Hawk and Copper are insane, but they're both 5 stars. Melvin isn't that good. Lehane is 2 free damage. I don't like Dayton much and Aurelia really sucks.
Gibson and Rowdy are very good, Gibson can take down ANY card, included Hawk and Copper. Gil is great, and Veenyle is much, much better that Melvin. And u have more room for other cards since it's just 12*...
I guess it would be Hawk, Lehane, Aurelia and Melvin VS Gibson, Rowdy, Gil and Veenyle, and Junkz obviously win in that case...even if u put Dayton on Aurelia it wouldn't change much, and that'd be 13*. I think sentinels need another good 2* and a better DR. A 2* DR would be great
Junkz are way more versatile and have a very mean 2* DR (Veenyle) and very solid, brutal 4 stars (Rowdy, Gibson) and you top that off with Gil, you're opponent will be clueless and begging for air.
I run Junkz so maybe that's why I brag on them so much but think about it, Junkz with Roots, it makes cards like Copper who are normally a 9/8 +8 attack, a mere 4/8 card where 4 power is pretty much worthless.
I also can note on that because I just had this situation in the last DT, and an opponent put majority of his/her's pills on Copper where Rico shut him up >.<