Difference between Attack Boost, Damage Boost, and Demolition Boost in Valkyria Chronicles?

In Valkyria Chronicles (PS3) does the increase in damage make up for the additional CP?

Say I have 5 CP to take out a tank. I could do:

• Attack Boost for 1 CP
• 4 CP of basic boost attacks

or

• Damage Boost for 2 CP
• 3 CP of medium boost attacks

or

• Demolition Boost for 3 CP
• 2 CP of high boost attacks

Does sacrificing an attack for an additional boost make up for it? Which boost is the optimal?