On an optimization level, I think it's fine, btw, to stack all your little big bonuses on one roll.
If (and that's a big if) you also make sure to make available and save your insurance for that one roll too. My paragon Avenger of Tempus frequently stacks RRoT on top of an enounter ability. But I'll also:
Oath the target first (obviously)
Try to get hit bonuses first if I can (including spending an action point for a +1 to hit)
Make sure I've got my Stone of Earth available to get a reroll if I need it--which combined with the Avenger double roll makes it -very- likely that I'll hit.
Make sure I haven't used up Memories of a Thousand Lives for the sweet bonuses there.
If anything, stacking that way makes you -less- likely to burn resources, as you don't want to waste resources just to hit on a daily power (where you're doing most of what you want to do on a miss anyway). And since I'm playing her LFR, if I've already used the SoE I'll probably stack Tempus on an at will instead, so I can have the card-based reroll from Fevrent Prayer available.
Despite this, well, sometimes you just can't win for losing. But that's how the game is played.
If (and that's a big if) you also make sure to make available and save your insurance for that one roll too. My paragon Avenger of Tempus frequently stacks RRoT on top of an enounter ability. But I'll also:
Oath the target first (obviously)
Try to get hit bonuses first if I can (including spending an action point for a +1 to hit)
Make sure I've got my Stone of Earth available to get a reroll if I need it--which combined with the Avenger double roll makes it -very- likely that I'll hit.
Make sure I haven't used up Memories of a Thousand Lives for the sweet bonuses there.
If anything, stacking that way makes you -less- likely to burn resources, as you don't want to waste resources just to hit on a daily power (where you're doing most of what you want to do on a miss anyway). And since I'm playing her LFR, if I've already used the SoE I'll probably stack Tempus on an at will instead, so I can have the card-based reroll from Fevrent Prayer available.
Despite this, well, sometimes you just can't win for losing. But that's how the game is played.