Concept, used this as an opening, not bad, but uses the OD from the start.
4b+c->OD->66->6d->236d-> 63214b [3402/20*]
Also found it reasonable to give a slight delay after 63214b & follow it with 2d allowing the opponent to do a wake up and go ->5d->6d->236d& go crazy with the then accumulated near100 heat.
*Total gain of 70 but 50 is spent on the 63214b, making a final amount of 20