Burst Teams/Boss Teams Int

The main problem I'm having is with my Int Team - I dont have Nico Robin and it was problem with Garp.

I just pulled X-Drake and am i missing something or is his abilitiy just the same as whitebeards apart from only using int characters? This should mean I should just level him and it should solve my problems of not having Robin?

I have :

Towel Nami
X-Drake
Chopper
Buggy
Don Krieg
Sergant Helmeppo
Vista
Broggy
Tsuru

I'm guessing the main setup you would use I would use is X-Drake, Buggy, Don Kreig, Vista, Broggy? What does everything think, do you think I have a chance with my current roster next time Garp comes around, or the next Psy boss?

Yes, the captain ability is the same like Whitebeard but only for INT units

But I would say that nothing can replace Robin in a INT burst team, she is a very important (or even the most important) unit in the burst team...

https://www.youtube.com/watch?v=ucZc_q6UIoI&index=35&list=PLoZejy6GIGcWR-A2LbtGpcLHYcpMFDru8
In this video you can also see, that he has the best orbs, an 1.5 orb boost and 2x Atk for INT units, and he deals 2.7 mille  damage 
Garp has 2 mille HP, so without 2x Atk from Robin  he's chance would have been much smaller...

Not experienced with drake but main problem i foresee is getting 30% hp and with garp hitting every single turn its the question how many hits you can take from him. Unless you take a damage reducer like smoker maybe. A quick team I can think of would be like: drake friend, drake, smoker, coby, buggy, broggy. Gets you at least 3 good orbs, orb booster and a damage reducer. So you will need to have 4500 hp when you enter garp and you will have 3 turns to finish him. Ultimately you will want to have 4500 hp AND activating drakes captain ability when you go to garp. So takes some hp calculations and planning but seems possible to me.