my votes on majin vegeta. he's the mix of strong and fast and has all of vegeta's toughest moves right at his disposal. plus vegeta's real cool as it is so why not?

it all depends even more so when in a DP Fight. like in mission 100 there a few DP fights so it depends what you mean by cheap ?

very powerfull charachter's have 9 points which is basicly half your team. you can have a full team with the ginyu force or bardock, fasha, raditz & nappa & Turless.

right now in DP battle's I use super #17 & harudagar that big yellow bug guy cause he's only 7 points & he had 6 bars of health.

Cheapest character?

If you're talking about non-customized, it's pretty much either SS4 Gogeta or LSSJ Brolly. They're both incredibly powerful and Brolly has an automatic Power Body and an unblockable Ultimate.

If you're talking about customized, SS$ Gogeta, SSJ2 Teen Gohan, LSSJ Brolly, etc. are still plenty cheap, but other characters have a few things that can be optimized for some real cheap trash. A couple examples are a fast Ki-Charging Syn Shenron Blazing Storm and Full Blast Stock SSJ Vegetto Afterimage.

For my DP battles i always use Goggeta and Veggito and i always win