So to increase the effect of the trinket you do like a small miniburn with a few AB5-6s but you don't want to use it during an actual burnphase where you can stack it with other cds like AP and managem. Doesn't sound logical to me.
Lets assume the trinket use is a 10% damage buff nice round number.
70k dps burn (assume 67% efficiency on the trinket cause of the manalevel) + 4,7k from the trinket
32k dps during small miniburn (assume 100% efficiency which is a bit too optimistic) +3,2k from the trinket
but now you also loose some dps recovering your mana again
It just doesn't add up for me.