Yea, the burst boost was rather disappointing. Thinking +150% to total burst damage was too much of wishful thinking. Going from 1mil to 2.5mil burst damage would be broken. Though I'm thinking it still fits in for best combination for grails still uses it. Maybe:
100 atk
100 hp
100 burst
100 triple atk

Kinda wish they gave us the values for triple and double attack. I mean I can't really see any reason to get double over triple, unless triple has a smaller increase rate compared to double.